MgB2 Preprints- The Superconductivity Information Center and High-Tc Update

MgB2 Preprint List

We have set aside a special section of our web site for preprints related to superconductivity in MgB2.

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Preprints Received in:

January 2003	April 2003	July 2003	October 2003
February 2003	May 2003	August 2003	November 2003
March 2003	June 2003	September 2003	December 2003

January 2002	April 2002	July 2002	October 2002
February 2002	May 2002	August 2002	November 2002
March 2002	June 2002	September 2002	December 2002

January 2001	April 2001	July 2001	October 2001
February 2001	May 2001	August 2001	November 2001
March 2001	June 2001	September 2001	December 2001

(Note: Preprints are listed in alphabetical order by first author)

January 2001 Preprints:

S. L. Bud'ko, G. Lapertot, C. Petrovic, C. E. Cunningham, N. Anderson, and P. C. Canfield, "Boron Isotope Effect in Superconducting MgB_2." E-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0101463.

J. Kortus, I. I. Mazin, K. D. Belashchenko, V. P. Antropov, and L. L. Boyer, "Superconductivity of metallic boron in MgB_2." Submitted to Phys. Rev. Lett. I. I. Mazin's e-mail mazin@dave.nrl.navy.mil; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0101446

February 2001 Preprints:

J. M. An and W. E. Pickett, "Superconductivity of MgB2 from Hole-Doped Covalent Bonds." W. E. Pickett's e-mail pickett@solid.ucdavis.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102391.

A. Bianconi, N. L. Saini, D. Di Castro, S. Agrestini, G. Campi, A. Saccone, S. De Negri, M. Giovannini, and M. Colapietro, "High Tc superconductivity at a critical strain and charge density in diborides." E-mail antonio.bianconi@roma1.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102410.

S. L. Bud'ko, C. Petrovic, G. Lapertot, C. E. Cunningham, P. C. Canfield, M-H. Jung, and A. H. Lacerda, "Magnetoresistivity and Complete H_{c2}(T) in MgB_2." E-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102413.

Y. Bugoslavsky, G. K. Perkins, X. Qi, L. F. Cohen and A. D. Caplin, "Critical currents and vortex dynamics in superconducting MgB2." G. K. Perkins' e-mail g.perkins@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102353.

P. C. Canfield, D. K. Finnemore, S. L. Bud'ko, J. E. Ostenson, G. Lapertot, C. E. Cunningham, and C. Petrovic, "Superconductivity in Dense MgB_2 Wires." S. L. Bud'ko's e-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102289.

S. X. Dou, X. L. Wang, J. Horvat, D. Milliken, E. W. Collings, and M. D. Sumption, "Flux Jumping and a Bulk-to-Granular Transition in the Magnetization of a Compacted and Sintered MgB2 Superconductor." D. Milliken's e-mail dam01@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102320.

D. K. Finnemore, J. E. Ostenson, S. L. Bud'ko, G. Lapertot, and P. C. Canfield, "Thermodynamic and Transport Properties of Superconducting Mg^{10}B_2." S. L. Bud'ko's e-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102114.

J. E. Hirsch, "Hole Superconductivity in Mg B_2: a high T_c cuprate without Cu." E-mail jhirsch@ucsd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102115. Key words: MgB_2; holes, positive Hall coefficient, high Tc cuprates, universal mechansim, Chapnik's rule. 74.20.-z.

C. U. Jung, Min-Seok Park, W. N. Kang, Mun-Seog Kim, Kijoon H. P. Kim, S. Y. Lee, and Sung-Ik Lee, "Effect of sintering temperature under high pressure in the Superconductivity for MgB2." E-mail jungking@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102383.

C. U. Jung, Min-Seok Park, W. N. Kang, Mun-Seog Kim, S. Y. Lee, and Sung-Ik Lee, "Temperature- and magnetic-field-dependences of normal state resistivity of MgB_{2} prepared at high temperature and high pressure condition." Submitted to Phys. Rev. B. E-mail jungking@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102215.

W. N. Kang, C. U. Jung, Kijoon H. P. Kim, Min-Seok Park, S. Y. Lee, Hyeong-Jin Kim, Eun-Mi Choi, Kyung Hee Kim, Mun-Seog Kim, and Sung-Ik Lee, "Hole carrier in MgB_{2} characterized by Hall Measurements." E-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102313.

G. Karapetrov, M. Iavarone, W. K. Kwok, G. W. Crabtree, and D. G. Hinks, "Scanning Tunneling Spectroscopy in MgB2." E-mail goran@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102312.

Mun-Seog Kim, C. U. Jung, Min-Seok Park, S. Y. Lee, Kijoon H. P. Kim, W. N. Kang, and Sung-Ik Lee, "Prominent bulk pinning effect in the newly discovered MgB_2 superconductor." E-mail munseog@postech.ac.kr, preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102338.

H. Kotegawa, K. Ishida, Y. Kitaoka, T. Muranaka and J. Akimitsu, "Evidence for Strong-coupling S-wave Superconductivity in MgB2 :11B NMR Study." K. Ishida's e-mail ishida@mp.es.osaka-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102334.

D. C. Larbalestier, M. O. Rikel, L. D. Cooley, A. A. Polyanskii, J. Y. Jiang, S. Patnaik, X. Y. Cai, D. M. Feldmann, A. Gurevich, A. A. Squitieri, M. T. Naus, C. B. Eom, E. E. Hellstrom, R. J. Cava, K. A. Regan, N. Rogado, M. A. Hayward, T. He, J. S. Slusky, P. Khalifah, K. Inumaru, and M. Haas, "Strongly linked current flow in polycrystalline forms of the new superconductor MgB2." A. Gurevich's e-mail agourevi@facstaff.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102216.

B. Lorenz, R. L. Meng and C. W. Chu, "High Pressure Study on MgB2." C. W. Chu's e-mail tchristensen@uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102264.

Gabino Rubio-Bollinger, Hermann Suderow, and Sebastian Vieira, "Tunneling spectroscopy in small grains of superconducting MgB2." E-mail gabino.rubio@uam.es; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102242.

E. V. Sampathkumaran and Subham Majumdar, "Observation of superconductivity in Y_2PdGe_3, structurally same as MgB_2." Subham Majumdar's e-mail subham@tifr.res.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102110.

G. Satta, G. Profeta, F. Bernardini, A. Continenza, and S. Massidda, "Electronic and structural properties of superconducting diborides and calcium disilicide in the AlB_2 structure." Submitted to Phys. Rev. B. G. Profeta's e-mail gianni.profeta@aquila.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102358.

Herbert Schmidt, J. F. Zasadzinski, K. E. Gray, and D. G. Hinks, "Energy Gap from Tunneling and Metallic Sharvin Contacts onto MgB2: Evidence for a Weakened Surface Layer." E-mail hschmidt@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102389.

Amos Sharoni, Israel Felner, and Oded Millo, "Tunneling spectroscopy measurement of the superconductor gap parameter of MgB_2." E-mail sharoni@racah.phys.huji.ac.il; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102325.

J. S. Slusky, N. Rogado, K. A. Regan, M. A. Hayward, P. Khalifah, T. He, K. Inumaru, S. Loureiro, M. K. Haas, H. W. Zandbergen, and R. J. Cava, "Loss of superconductivity and structural transition in Mg1-xAlxB2." M. K. Haas' e-mail maryhaas@princeton.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102262.

Y. Takano, H. Takeya, H. Fujii , H. Kumakura, T. Hatano, K. Togano, H. Kito and H. Ihara, "Superconducting Properties of MgB2 Bulk Materials Prepared by High Pressure Sintering." E-mail takano@nrim.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102167.

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March 2001 Preprints

Jai Seok Ahn and Eun Jip Choi, "Carbon substitution effect in MgB_2." E-mail jsahn@physics.uos.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103169.

G. Baskaran, "RVB Contribution to Superconductivity in MgB_2." Based on a talk given at the Institute Seminar Week, IMSc, Madras (12-16, Feb. 2001) Report-no: imsc/2001/03/xx. E-mail baskaran@imsc.ernet.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103308.

K. D. Belashchenko, M. van Schilfgaarde, and V. P. Antropov, "Nature of Bonding and Electronic Structure in MgB2, a Boron Intercalation Superconductor." Submitted to Phys. Rev. B. E-mail kdbel@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102290. Key words: magnesium diboride, bonding, electronic structure. 71.20.-b, 74.25.Jb, 72.15.-v.

A. Bianconi, D. Di Castro, S. Agrestini, G. Campi, N. L. Saini, A. Saccone, S. De Negri, and M. Giovannini, "A Superconductor Made by a Metal Heterostructure at the Atomic Limit Tuned at the 'Shape Resonance': MgB2." E-mail antonio.bianconi@roma1.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103211.

D.H.A. Blank, H. Hilgenkamp, A. Brinkman, D. Mijatovic, G. Rijnders and H. Rogalla, "Superconducting Mg-B films by pulsed laser deposition in an in-situ two-step process using multi-component targets." Submitted to Applied Physics Letters. A. Brinkman's e-mail a.brinkman@tn.utwente.nl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103543.

K.-P. Bohnen, R. Heid, and B. Renker, "Phonon dispersion and electron-phonon coupling in MgB_2 and AlB_2." R. Heid's e-mail heid@ifp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103319.

A. Brinkman, D. Mijatovic, G. Rijnders, V. Leca, H.J.H. Smilde, I. Oomen, A. A. Golubov, F. Roesthuis, S. Harkema, H. Hilgenkamp, D.H.A. Blank and H. Rogalla, "Superconducting thin films of MgB2 on (001)-Si by pulsed laser deposition." A. A. Golubov's e-mail a.golubov@tn.utwente.nl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103198.

T. A. Callcott, L. Lin, G. T. Woods, G. P. Zhang, J. R. Thompson, M. Paranthaman, and D. L. Ederer, "Soft x-ray spectroscopy measurements of the p-like density of states of B in MgB2 and evidence for surface boron oxides on exposed surfaces." Submitted to Phys. Rev. Lett. E-mail tcallcott@utk.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103593.

X. H. Chen, Y. Y. Xue, R. L. Meng, and C. W. Chu, "Penetration Depth and Anisotropy in MgB2." Submitted to Phys. Rev. B. C. W. Chu's e-mail tchristensen@uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103029.

X. K. Chen, M. J. Konstantinovic, J. C. Irwin, D. D. Lawrie, and J. P. Franck, "Investigation of the Superconducting Gap in MgB2 by Raman Spectroscopy." E-mail mxchen@sfu.ca; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104005.

H. M. Christen, H. Y. Zhai, C. Cantoni, M. Paranthaman, B. C. Sales, C. Rouleau, D. P. Norton, D. K. Christen, and D. H. Lowndes, "Superconducting magnesium diboride films with Tc \approx 24K grown by pulsed laser deposition with in-situ anneal." E-mail christenhm@ornl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103478.

C. E. Cunningham, C. Petrovic, G. Lapertot, S. L. Bud'ko, F. Laabs, W. Straszheim, D. K. Finnemore, and P. C. Canfield, "Synthesis and Processing of MgB_2 powders and wires." S. L. Bud'ko's e-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103390.

O. F. de Lima, R. A. Ribeiro, M. A. Avila, C. A. Cardoso and A. A. Coelho, "Anisotropic superconducting properties of aligned MgB2 crystallites." Submitted to Phys. Rev. Lett. M. A. Avila's e-mail marcos@ifi.unicamp.br; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103287. Key words: MgB2; MgB2 anisotropy; MgB2 crystallites. 74.25.Ha, 74.60.Ec, 74.60.Jg, 74.70.Ad.

C. B. Eom, M. K. Lee, J. H. Choi, L. Belenky, X. Song, L. D. Cooley, M. T. Naus, S. Patnaik, J. Jiang, M. Rikel, A. Polyanskii, A. Gurevich, X. Y. Cai, S. D. Bu, S. E. Babcock, E. E. Hellstrom, D. C. Larbalestier, N. Rogado, K. A. Regan, M. A. Hayward, T. He, J. S. Slusky, K. Inumaru, M. K. Haas, and R. J. Cava, "Thin Film Magnesium Boride Superconductor with Very High Critical Current Density and Enhanced Irreversibility Field." Submitted to Nature. L. D. Cooley's e-mail ldcooley@facstaff.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103425.

Z. Y. Fan, D. G. Hinks, N. Newman, and J. M. Rowell, "Experimental study of MgB2 decomposition." Submitted to Applied Physics Letter. E-mail zhaoyang.fan@asu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103435.

Israel Felner, "Absence of Superconductivity in BeB2." To be published in Physica C (in press). Racah Institute of Physics, The Hebrew University, Jerusalem 91904, ISRAEL; telephone +972 2 658 5752; telefax +972 2 658 6347; e-mail israela@vms.huji.ac.il; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102508.

Nobuo Furukawa, "Antiferromagnetism of the Hubbard Model on a Layered Honeycomb Lattice - Is MgB_2 a Nearly-Antiferromagnetic Metal?" E-mail furukawa@phys.aoyama.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/ 0103184.

A. Gerashenko, K. Mikhalev, S. Verkhovskii, T. D'yachkova, A. Tyutyunnik, and V. Zubkov, "Electronic States of Boron in Superconducting MgB_2 Studied by ^{11}B NMR." Preprint available at http://xxx.lanl.gov/abs/cond-mat/0102421.

B. Gorshunov, C. A. Kuntscher, P. Haas, M. Dressel, F. P. Mena, A. B. Kuz'menko, D. van der Marel, T. Muranaka, and J. Akimitsu, "Optical measurements of the superconducting gap in MgB2." Submitted to European Physics Journal B. C. A. Kuntscher's e-mail kuntscher@pi1.physik.uni-stuttgart.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103164.

G. Grassano, W. Ramadan, V. Ferrando, E. Bellingeri, D. Marre', C. Ferdeghini, G. Grasso, M. Putti, A. S. Siri, P. Manfrinetti, A. Palenzona, and A. Chincarini, "In-situ Magnesium Diboride Superconducting Thin Films grown by Pulsed Laser Deposition." E-mail grassano@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103572.

G. Grasso, A. Malagoli, C. Ferdeghini, S. Roncallo, V. Braccini, M. R. Cimberle and A. S. Siri, "Large transport critical currents in unsintered MgB2 superconducting tapes." E-mail grasso@ge.infm.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103563.

N. Hakim, P. V. Parimi, C. Kusko, S. Sridhar, P. C. Canfield, S. L. Bud'ko and D. K. Finnemore, "Microwave properties of superconducting MgB_{2}." C. Kusko's e-mail kusko@neu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103422.

A. Handstein, D. Hinz, G. Fuchs, K.-H. Muller, K. Nenkov, O. Gutfleisch, V.N. Narozhnyi, and L. Schultz, "Fully dense MgB_2 superconductor textured by hot deformation." E-mail narozh@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103408.

T. He, Q. Huang, A. P. Ramirez, Y. Wang, K. A. Regan, N. Rogado, M. A. Hayward, M. K. Haas, J. S. Slusky, K. Inumaru, H. W. Zandbergen, N. P. Ong, and R. J. Cava, "Superconductivity in the non-oxide Perovskite MgCNi3." E-mail taohe@phoenix.princeton.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103296.

J. E. Hirsch and F. Marsiglio, "Electron-Phonon or Hole Superconductivity in MgB_2?." E-mail jhirsch@ucsd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102479.

Masatoshi Imada, "Superconductivity Driven by the Interband Coulomb Interaction and Implications for the Superconducting Mechanism of MgB2." E-mail imada@issp.u-tokyo.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103006.

J. D. Jorgensen, D. G. Hinks, and S. Short, "Lattice Properties of MgB2 versus Temperature and Pressure." S. Short's e-mail short@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103069.

Amish G. Joshi, C.G.S. Pillai, P. Raj and S. K. Malik, "Magnetization studies on superconducting MgB_2 - lower and upper critical fields and critical current density." E-mail amishjoshi@tifr.res.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103302.

Janhavi P. Joshi, Subhasis Sarangi, A. K. Sood and S. V. Bhat, "Non-resonant microwave absorption studies of superconducting MgB_2." E-mail janhavi@physics.iisc.ernet.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103369.

J. K. Jung, Seung Ho Baek, F. Borsa, S. L. Bud'ko, G. Lapertot, and P. C. Canfield, "^{11}B NMR and Relaxation in MgB_2 Superconductor." S. L. Bud'ko's e-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103040.

D. Kaczorowski, A. J. Zaleski, O. J. Zogal, and J. Klamut, "Incipient superconductivity in TaB_{2}." E-mail dkaczor@int.pan.wroc.pl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103571.

M. Kambara, N. Hari Babu, E. S. Sadki, J. R. Cooper, H. Minami, D. A. Cardwell, A. M. Campbell and I. H. Inoue, "High Intergranular Critical Currents in Metallic MgB2 Superconductor." Supercond. Sci. Technol. 14, L5-L7 (2001).

W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, C. U. Jung, and Sung-Ik Lee, "Epitaxial MgB2 superconducting thin films with a transition temperature of 39 Kelvin." E-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103179.

W. N. Kang, Kijoon H. P. Kim, Hyeong-Jin Kim, Eun-Mi Choi, Min-Seok Park, Mun-Seog Kim, Zhonglian Du, Chang Uk Jung, Kyung Hee Kim, Sung-Ik Lee, and Mi-Ock Mun, "Fluctuation Magnetoconductance in MgB2." Kijoon H. P. Kim's e-mail kijoon@anyon.postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103161.

A. E. Karkin, V. I. Voronin, T. V. Dyachkova, A. P. Tyutyunnik, V. G. Zubkov, Yu. G. Zainulin, and B. N. Goshchitskii, "Superconducting properties of MgB_2 probed by radiation-induced disordering." Preprint available at
http://xxx.lanl.gov/abs/cond-mat/0103344.

S. M. Kazakov, M. Angst, and J. Karpinski, "Substitution effect of Zn and Cu in MgB2 on Tc and structure." E-mail kazakov@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103350.

Kijoon H. P. Kim, W. N. Kang, Mun-Seog Kim, C. U. Jung, Hyeong-Jin Kim, Eun-Mi Choi, Min-Seok Park, and Sung-Ik Lee, "Origin of the high DC transport critical current density for the MgB2 superconductor." E-mail kijoon@anyon.postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103176.

A. Kohen and G. Deutscher, "Symmetry and Temperature dependence of the Order parameter in MgB2 from point contact measurements." E-mail kohen@post.tau.ac.il; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103512.

Mahito Kohmoto, Iksoo Chang and Jacques Friedel, "Enhancement of superconductive critical temperatures in almost empty or full bands in two dimensions: possible relevance to \beta-HfNCl, C_{60} and MgB_2." Iksoo Chang's e-mail chang@random.phys.pusan.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103352.

Y. Kong, O. V. Dolgov, O. Jepsen, and O. K. Andersen, "Electron-phonon interaction in the normal and superconducting states of MgB2." O. Jepsen's e-mail jepsen@and.mpi-stuttgart.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102499.

R. K. Kremer, B. J. Gibson, and K. Ahn, "Heat Capacity of MgB_2: Evidence for Moderately Strong Coupling Behavior." Submitted to Phys. Rev. Lett. B. J. Gibson's e-mail bren@cesux.mpi-stuttgart.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102432.

N. Kristoffel and T. Ord, "Two-band model and MgB_2 superconductivity." T. Ord's e-mail teetord@ut.ee; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103536.

E. Z. Kurmaev, I. I. Lyakhovskaya, J. Kortus, N. Miyata, M. Demeter, M. Neumann, M. Yanagihara, M. Watanabe, T. Muranaka, and J. Akimitsu, "Electronic structure of MgB_2: X-ray emission and absorption spectra." Submitted to Phys. Rev. Lett. J. Kortus' e-mail kortus@theo.physik.tu-freiberg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103487.

A. H. Li, X. L. Wang, M. Ionescu, S. Soltonian, J. Horvat, T. Silver, H. K. Liu, and S. X. Dou, "Fast formation and superconductivity of MgB2 thick films grown on stainless steel substrate." Submitted to Physica C. Contact X. L. Wang, Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2522, Australia; fax:+61 2 42215731; e-mail xiaolin@uow.edu.au.

S. L. Li, H. H. Wen, Z. W. Zhao, Y. M. Ni, Z. A. Ren, G. C. Che, H. P. Yang, Z. Y. Liu and Z. X. Zhao, "Lower Critical Field at Odds with A S-Wave Superconductivity in The New Superconductor MgB_2." E-mail slli@ssc.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103032.

Amy Y. Liu, I. I. Mazin, and Jens Kortus, "Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps." E-mail liu@physics.georgetown.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103570.

Zi-Kui Liu, D. G. Schlom, Qi Li, and X. X. Xi, "Thermodynamics of the Mg-B system: Implications for the deposition of MgB2 thin films." X. X. Xi's e-mail xxx4@psu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103335.

I. Loa and K. Syassen, "Calculated elastic and electronic properties of MgB_2 at high pressures." Accepted for publication in Solid State Commun. E-mail loa@servix.mpi-stuttgart.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102462.

N. I. Medvedeva, A. L. Ivanovskii, J. E. Medvedeva, and A. J. Freeman, "Electronic structure of superconducting MgB2 and related binary and ternary borides." J. E. Medvedeva's e-mail jem@pluto.phys.nwu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103157.

K.-H. Muller, G. Fuchs, A. Handstein, K. Nenkov, V. N. Narozhnyi, and D. Eckert, "The upper critical field in superconducting MgB_2." V. N. Narozhnyi's e-mail narozh@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102517.

R. Osborn, E. A. Goremychkin, A. I. Kolesnikov, and D.G. Hinks, "Phonon Density-of-States in MgB2." E-mail rosborn@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103064.

C. Panagopoulos, B. D. Rainford, T. Xiang, C. A. Scott, M. Kambara, and I. H. Inoue, "Penetration Depth Measurements in MgB_2: Evidence for Unconventional Superconductivity." T. Xiang's e-mail tx100@cus.cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103060.

M. Paranthaman, C. Cantoni, H. Y. Zhai, H. M. Christen, T. Aytug, S. Sathyamurthy, E. D. Specht, J. R. Thompson, D. H. Lowndes, H. R. Kerchner, and D. K. Christen, "Superconducting MgB(2) films via precursor post-processing approach." J. R. Thompson's e-mail jrt@utk.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103569.

K. Prassides, Y. Iwasa, T. Ito, D. H. Chi, K. Uehara, E. Nishibori, M. Takata, S. Sakata, Y. Ohishi, O. Shimomura, T. Muranaka, and J. Akimitsu, "Compressibility of the MgB2 Superconductor." E-mail k.prassides@sussex.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102507.

Armando Reyes-Serrato and Donald H. Galvan, "Ab initio Hartree-Fock with electronic correlation study of the electronic properties of MgB2." Submitted to Phys. Rev. B. E-mail armando@ccmc.unam.mx; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103477.

Taku J. Sato, Kaoru Shibata and Yoshihiko Takano, "Vibrational Density of States in Superconducting MgB_2." E-mail sato@tamamori.nrim.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102468.

A. Sharoni, O. Millo, G. Leitus, and S. Reich, "Spatial variations of the superconductor gap structure in MgB2/Al composite." Submitted to Journal of Physics. E-mail sharoni@racah.phys.huji.ac.il; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103407.

S. R. Shinde, S. B. Ogale, R. L. Greene, T. Venkatesan, P. C. Canfield, S. L. Budko, G. Lapertot, and C. Petrovic, "Superconducting MgB2 thin films by pulsed laser deposition." E-mail shinde@squid.umd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103542.

S. V. Shulga, S.-L. Drechsler, H. Eschrig, H. Rosner, W. E. Pickett, "The upper critical field problem in MgB2." S.-L. Drechsler's e-mail s.l.drechsler@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103154.

M. D. Sumption, X. Peng, E. Lee, M. Tomsic, and E. W. Collings, "Transport Current in MgB2 based Superconducting Strand at 4.2 K and Self-Field." E-mail mdsumption+@osu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102441.

Gun Yong Sung, Sang Hyeob Kim, JunHo Kim, Dong Chul Yoo, Ju Wook Lee, Jeong Yong Lee, C. U. Jung, Min-Seok Park, W. N. Kang, Du Zhonglian, and Sung-Ik Lee, "Microstructure of the highly dense MgB2 Superconductor by transmission electron microscope." Submitted to Appl. Phys. Lett. E-mail gysung@etri.re.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102498. Key words: Superconductivity, Materials science, Microstructure, MgB2, Transmission electron microscopy. 74.60.-w, 74.62.Bf, 61.14.Lj, 61.16.Bg.

S. Suzuki, S. Higai, and K. Nakao, "Two-Dimensional Sigma-Hole Systems in Boron Layers: A First-Principles Study on Mg_{1-x}Na_xB_2 and Mg_{1-x}Al_xB_2." E-mail shugo@moose.ims.tsukuba.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102484.

T. Takahashi, T. Sato, S. Souma, T. Muranaka, and J. Akimitsu, "High-Resolution Photoemission Study of MgB2." S. Souma's e-mail souma@mail.cc.tohoku.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103079.

T. Takenobu, T. Ito, Dam H. Chi, K. Prassides, and Y. Iwasa, "Intralayer Carbon Substitution in the MgB2 Superconductor." E-mail takenobu@jaist.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103241.

J. R. Thompson, M. Paranthaman, D. K. Christen, K. D. Sorge, H. J. Kim, and J. G. Ossandon, "High temporal stability of supercurrents in MgB(2) materials." E-mail jrt@utk.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103514.

T. Tomita, J. J. Hamlin, J. S. Schilling, D. G. Hinks, and J. D. Jorgensen, "The Dependence of Tc on Hydrostatic Pressure in Superconducting MgB2." Submitted to Phys. Rev. B. J. S. Schilling's e-mail schill@wuphys.wustl.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat//0103538.

H. Tou, H. Ikejiri, Y. Maniwa, T. Ito, T. Takenobu, K. Prassides and Y. Iwasa, "Evidence for Spin-Singlet Superconductivity in Layered MgB2." E-mail tou@phys.metro-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103484.

R. P. Vasquez, C. U. Jung, Min-Seok Park, Heon-Jung Kim, J. Y. Kim, and Sung-Ik Lee, "X-ray Photoemission Study of MgB2." Submitted to Phys. Rev. B. Jet Propulsion Laboratory, Mail Stop 302-306, 4800 Oak Grove Drive, Pasadena, CA 91109-8099; e-mail richard.vasquez@jpl.nasa.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103215. Key words: magnesium diboride, photoemission, surface cleaning. 74.70.Ad, 79.60.-i, 82.80.Pv, 81.65.Cf.

K. Voelker, V. I. Anisimov, and T. M. Rice, "Acoustic Plasmons in MgB2." E-mail kvoelker@itp.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103082.

T. Vogt, G. Schneider, J. A. Hriljac, G. Yang, and J. S. Abell, "Compressibility and Electronic Structure of MgB2 up to 8 Gpa." E-mail tvogt@bnl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102480.

Ch. Walti, E. Felder, C. Degen, G. Wigger, R. Monnier, B. Delley, and H. R. Ott, "Strong Electron-Phonon Coupling in Superconducting MgB_2: A Specific Heat Study." E-mail waelti@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/ 0102522.

Y. Wang, T. Plackowski, and A. Junod, "Specific heat in the superconducting and normal state (2-300 K, 0-16 Teslas), and magnetic susceptibility of the 38-K superconductor MgB2: evidence for a multicomponent gap." A. Junod's e-mail alain.junod@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103181.

H. H. Wen, S. L. Li, Z. W. Zhao, Y. M. Ni, Z. A. Ren, G. C. Che, H. P. Yang, Z. Y. Liu, and Z. X. Zhao, "Strong quantum fluctuation of vortices in the new superconductor MgB_2." E-mail hhwen@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0102436.

H. H. Wen, S. L. Li, Z. W. Zhao, Y. M. Ni, Z. A. Ren, G. C. Che, and Z. X. Zhao, "Flux dynamics and vortex phase diagram of the new superconductor MgB_2." S. L. Li's e-mail slli@ssc.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103521.

Kunihiko Yamaji, "Two-Band-Type Superconducting Instability in MgB2." E-mail yamaji@etl.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103431.

T. Yildirim, O. Gulseren, J. W. Lynn, C. M. Brown, T. J. Udovic, H. Z. Qing, N. Rogado, K. A. Regan, M. A. Hayward, J. S. Slusky, T. He, M. K. Haas, P. Khalifah, K. Inumaru, and R. J. Cava, "Giant anharmonicity and non-linear electron-phonon coupling in MgB_{2}; A combined first-principles calculations and neutron scattering study." O. Gulseren's e-mail oguz@nist.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103469.

H. Y. Zhai, H. M. Christen, L. Zhang, C. Cantoni, M. Paranthaman, B. C. Sales, D. K. Christen, and D. H. Lowndes, "Superconducting magnesium diboride films on Silicon with Tc0 ~ 24K grown via vacuum annealing from stoichiometric precursors." E-mail zhai@solid.ssd.ornl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103588.

H. Y. Zhai, H. M. Christen, L. Zhang, C. Cantoni, M. Paranthaman, B. C. Sales, P. H. Fleming, D. K. Christen, and D. H. Lowndes, "Growth mechanism of superconducting MgB2 films prepared by various methods." Submitted to Nature. E-mail zhai@solid.ssd.ornl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103618.

Y. G. Zhao, X. P. Zhang, P. T. Qiao, H. T. Zhang, S. L. Jia, B. S. Cao M. H. Zhu, Z. H. Han, X. L. Wang, and B. L. Gu, "Effect of Li doping on structure and superconducting transition temperature of Mg1-xLixB2." E-mail ygzhao@tsinghua.edu.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103077.

A. A. Zhukov, K.Yates, G. K Perkins, Y. Bugoslavsky, M. Polichetti, A. Berenov, J. Driscoll, A.D. Caplin L.F. Cohen, Ling Hao, and J. Gallop, "Microwave Surface Resistance in MgB2." Accepted in SUST. E-mail a.zhukov@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103587.

BACK TO TOP

April 2001 Preprints

A. S. Alexandrov, "Nonadiabatic superconductivity in MgB2 and cuprates." Submitted to Physical Review. E-mail a.s.alexandrov@lboro.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104413.

E. Bauer, Ch. Paul, St. Berger, S. Majumdar, H. Michor, M. Giovannini, A. Saccone, A. Bianconi, "Thermal conductivity of superconducting MgB2." E-mail bauer@xphys.tuwien.ac.at; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104203.

F. Bouquet, R. A. Fisher, N. E. Phillips, D. G. Hinks, and J. D. Jorgensen, "Specific Heat of Mg ^{11}B_2." N. E. Phillips' e-mail nephill@collchem.cchem.berkeley.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104206.

Y. Bugoslavsky, L. F. Cohen, G. K. Perkins, M. Polichetti, T. J. Tate, R. Gwilliam and A. D. Caplin, "Enhancement of the high-field critical current density of superconducting MgB2 by proton irradiation." M. Polichetti's e-mail m.polichetti@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104156.

C.-T. Chen, P. Seneor, N.-C. Yeh, R. P. Vasquez, C. U. Jung, Min-Seok Park, Heon-Jung Kim, W. N. Kang, and Sung-Ik Lee, "Spectroscopic Evidence for Anisotropic S-Wave Pairing Symmetry in MgB2." Submitted to Phys. Rev. Lett. Contact N.-C. Yeh; e-mail ncyeh@caltech.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104285.

E. S. Choi, W. Kang, J. Y. Kim, Min-Seok Park, C. U. Jung, Heon-Jung Kim, and Sung-Ik Lee, "Pressure dependent thermoelectric power of MgB_2 superconductor." E-mail eschoi@mm.ewha.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104454.

Marc Dhalle, Pierre Toulemonde, Concetta Beneduce, Nicolas Musolino, Michel Decroux and Rene Flukiger, "Transport - and inductive critical current densities in superconducting MgB2." Submitted to Physica C. E-mail marc.dhalle@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104395.

G. Fuchs, K.-H. Muller, A. Handstein, K. Nenkov, V. N. Narozhnyi, D. Eckert, M. Wolf, and L. Schultz, "Upper critical field and irreversibility line in superconducting MgB_2." Submitted to Solid State Communications. V. N. Narozhnyi's e-mail narozh@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104088.

Vitaly A. Gasparov, N. S. Sidorov, I. I. Zver'kova, and M.P. Kulakov, "Electron Transport in Diborides: Observation of Superconductivity in ZrB2." E-mail vgasparo@issp.ac.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104323.

Alexander F. Goncharov, Viktor V. Struzhkin, Eugene Gregoryanz, Jingzhu Hu, Russell J. Hemley, Ho-kwang Mao, G. Lapertot, S. L. Bud'ko, and P. C. Canfield, "Raman spectrum and lattice parameters of MgB2 as a function pressure." E-mail goncharov@gl.ciw.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104042.

L. Gozzelino, F. Laviano, D. Botta, A. Chiodoni, R. Gerbaldo, G. Ghigo, E. Mezzetti, G. Giunchi, S. Ceresara, G. Ripamonti, and M. Poyer, "Critical state analysis in MgB2 bulk by means of quantitative MO technique." E. Mezzetti's e-mail mezzetti@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104069.

Stephan Haas and Kazumi Maki, "Anisotropic s-wave superconductivity in MgB_2." E-mail shaas@physsh.usc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104207.

D. G. Hinks, H. Claus, and J. D. Jorgensen, "The reduced total isotope effect and its implications on the nature of superconductivity in MgB2." E-mail hinks@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104242.

A.K.M.A. Islam, F. N. Islam, and M. N. Islam, "Model Spectral Function For MgB2 Superconductor." Physics Letters A (2001). E-mail azharislam46@yahoo.com. Key words: Eliashberg spectral function, MgB2, Electron-phonon coupling, gap ratio. 74.25.

R. Jin, M. Paranthaman, H. Y. Zhai, H. M. Christen, D. K. Christen, and D. Mandrus, "Unusual Hall Effect in Superconducting MgB_2 Films: \hspace{6cm} Analogy to High-T_c Cuprates." E-mail jinr@ornl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104411.

S. Jin, H. Mavoori and R. B. van Dover, "High transport critical currents in dense, metal-clad superconductor wires of MgB2." Submitted to Nature. H. Mavoori's e-mail hareesh@lucent.com; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104236.

T. H. Johansen, M. Baziljevich, D. V. Shantsev, P. E. Goa, Y. M. Galperin, W. N. Kang, H. J. Kim, E. M. Choi, M.-S. Kim, S. I. Lee, "Complex flux dynamics in MgB2 films." Submitted to Nature. Department of Physics, University of Oslo, P.O. Box 1048, Blindern, 0316 Oslo, Norway; Phone +47 22 85 64 81; Fax +47 22 85 64 22; e-mail tomhj@fys.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104113 (for high-quality MO images see http://www.fys.uio.no/faststoff/ltl/results/biology/index.html). Key words: MgB2, flux jumps, magneto-optics, thin film, instability, dendrites, critical current, flux distribution. 74.60.Ge, 74.25.Ha.

D. Kaczorowski, J. Klamut, A. J. Zaleski, "Some comments on superconductivity in diborides." A. J. Zaleski's e-mail zaleski@int.pan.wroc.pl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104479.

W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, C. U. Jung, and Sung-Ik Lee, "MgB2 superconducting thin films with a transition temperature of 39 Kelvin." Published in Science, 12 April 2001. W. N. Kang's e-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104266.

K. Kawano, J. S. Abell, M. Kambara, N. Hari Babu, and D. A. Cardwell, "Evidence for high inter-granular current flow in single-phase polycrystalline MgB2 superconductor." E-mail k.kawano@bham.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104114.

J. Q. Li, L. Li, F. M. Liu, C. Dong, J. Y. Xiang, and Z. X. Zhao, "Superconductivity and Aluminum Ordering in Mg1-xAlxB2." F. M. Liu's e-mail fmliu@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104320.

J. Q. Li, L. Li, Y. Q. Zhou, Z. A. Ren, G. C. Che, and Z. X. Zhao, "Structural features, stacking faults, and grain boundaries in MgB2 superconducting materials." L. Li's e-mail lilong@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104350.

B. Lorenz, R. L. Meng, and C. W. Chu, "Hydrostatic Pressure Effect on the Superconducting Transition Temperature of MgB2." E-mail blorenz@bayou.uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104303.

B. Lorenz, R. L. Meng, Y. Y. Xue, and C. W. Chu, "Thermoelectric power and transport properties of pure and Al-doped MgB2." Submitted to Physical Review B. C. W. Chu's e-mail tchristensen@uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104041.

N. I. Medvedeva, A. L. Ivanovskii, J. E. Medvedeva, A. J.Freeman, and D. L. Novikov, "Electronic structure and electric field gradient in MgB_2 and related s-, p- and d-metal diborides: possible correlation with superconductivity." J. E. Medvedeva's e-mail jem@pluto.phys.nwu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104346.

M. J. Mehl, D. A. Papaconstantopoulos, and D. J. Singh, "Effects of C, Cu and Be substitutions in superconducting MgB2." D. J. Singh's e-mail singh@dave.nrl.navy.mil; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104548.

S. H. Moon, J. H. Yun, H. N. Lee, J. I. Kye, H. G. Kim, W. Chung, and B. Oh, "High critical current densities in superconducting MgB2 thin films." J. I. Kye's e-mail jkye@supercon.snu.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104230.

Y. Moritomo and Sh. Xu, "Effects of transition metal doping in MgB_2 superconductor." E-mail moritomo@cirse.nagoya-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104568.

J. B. Neaton and A. Perali, "On the possibility of superconductivity at higher temperatures in sp-valent diborides." E-mail neaton@physics.rutgers.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104098.

M. Paranthaman, J. R. Thompson, and D. K. Christen, "Effect of Carbon-Doping in Bulk Superconducting MgB2 Samples." E-mail paranthamanm@ornl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104086.

Kwon Park and Subir Sachdev, "Bond operator theory of doped antiferromagnets: from Mott insulators with bond-centered charge order, to superconductors with nodal fermions." Subir Sachdev's e-mail subir.sachdev@yale.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104519.

K. Parlinski, "Ab initio lattice dynamics of BeB_2, MgB_2 and CaB_2." E-mail parlinsk@alf.ifj.edu.pl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104105.

S. Patnaik, L. D. Cooley, A. Gurevich, A. A. Polyanskii, J. Jiang, X. Y. Cai, A. A. Squitieri, M. T. Naus, M. K. Lee, J. H. Choi, L. Belenky, S. D. Bu, J. Letteri, X. Song, D. G. Schlom, S. E. Babcock, C. B. Eom, E. E. Hellstrom, and D. C. Larbalestier, "Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB2 thin films." L. D. Cooley's e-mail ldcooley@facstaff.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104562.

A. Plecenik, S. Benacka, P. Kus, and M. Grajcar, "Superconducting gap parameters of MgB2 obtained on MgB2/Ag and MgB2/In junctions." E-mail plecenik@savba.sk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104038.

A. V. Pronin, A. Pimenov, A. Loidl, and S. I. Krasnosvobodtsev, "Optical conductivity and penetration depth in MgB2." A. Pimenov's e-mail andrei.pimenov@physik.uni-augsburg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104312.

M. J. Qin, X. L. Wang, H. K. Liu, and S. X. Dou, "Dependence of the flux creep activation energy on current density and magnetic field for MgB2 superconductor." E-mail qin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104112.

P. Ravindran, P. Vajeeston, R. Vidya, A. Kjekshus, and H. Fjellvaag, "Detailed electronic structure studies on superconducting MgB_2 and related compounds." E-mail ravindran.ponniah@kjemi.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104253.

F. Simon, A. Janossy, T. Feher, F. Muranyi, S. Garaj, L. Forro, C. Petrovic, S. L. Bud'ko, G. Lapertot, V. G. Kogan, and P. C. Canfield, "Anisotropy of superconducting MgB2 as seen in electron spin resonance and magnetization data." E-mail simon@esr1.fkf.bme.hu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104557.

Prabhakar P. Singh, "Role of Boron p-Electrons and Holes in Superconducting MgB2, and other Diborides: A Fully-Relaxed, Full-Potential Electronic Structure Study." Submitted to Phys Rev. Lett. E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104563.

Prabhakar P. Singh, "Superconductivity in MgB2 and TaB2: A Full-Potential Electronic Structure Comparison." Submitted to Phys. Rev. B. E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104580.

S. Soltanian, X. L. Wang, I. Kusevic, E. Babic, A. H. Li, H. K. Liu, E. W. Collings, and S. X. Dou, "High transport critical current density above 30 K in pure Fe-clad MgB2 tape." Contact X. L. Wang; Fax +61 2 42215731; e-mail xiaolin@uow.edu.au. Key words: MgB2, Fe clad tape, transport Jc. 74.70.Ad, 74.25.Fy.

C. S. Sundar, A. Bharathi, M. Premila, T. N. Aairam, S. Kalavathi, G.L.N. Reddy, V. S. Sastry, Y. Hariharan, and T. S. Radhakrishnan, "Infrared absorption in superconducting MgB2." E-mail css@igcar.ernet.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104354.

M. I. Tsindlekht and I. Felner, "Linear and Nonlinear Ac Response of MgB2 Superconductors." E-mail mtsindl@vms.huji.ac.il; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104565.

S. Tsuda, T. Yokoya, T. Kiss, Y. Takano, K. Togano, H. Kitou, H. Ihara, and S. Shin, "Direct evidence for a multiple superconducting gap in MgB2 from high-resolution photoemission spectroscopy." Submitted to Phys. Rev. Lett. E-mail tsuda@issp.u-tokyo.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104489.

A. V. Tsvyashchenko, L. N. Fomicheva, M. V. Magnitskaya, E. N. Shirani, V. B. Brudanin, D. V. Filossofov, O. I. Kochetov, N. A. Lebedev, A. F. Novgorodov, A. V. Salamatin, N. A. Korolev, A. I. Velichkov, V. V. Timkin, A. P. Menushenkov, A. V. Kuznetsov, V. M. Shabanov, and Z. Z. Akselrod, "Electric field gradients in MgB_2 synthesized at high pressure: ^111Cd TDPAC study and ab initio calculation." M. V. Magnitskaya's e-mail maria@lpi.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104560.

Xiangang Wan, Jinming Dong, Hongming Weng, and D. Y. Xing, "The bond structure of MgB_{2} with different lattice constants." E-mail ccmp@nju.edu.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104216.

S. F. Wang, S. Y. Dai, Y. L. Zhou, Z. H. Chen, D. F. Cui, J. D. Yu, M. He, H. B. Lu, and G. Z. Yang, "Superconducting MgB2 Thin Films with Tc of about 39K Grown by Pulsed Laser Deposition." E-mail wch@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104555.

J. Y. Xiang, D. N. Zheng, J. Q. Li, L. Li, P. L. Lang, H. Chen, C. Dong, G. C. Che, Z. A. Ren, H. H. Qi, H. Y. Tian, Y. M. Ni, and Z. X. Zhao, "Study of superconducting properties and observation of c-axis superstructure in Mg1-xAlxB2." E-mail jyxiang@ssc.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104366.

Sheng Xu, Yutaka Moritomo, Kenichi Kato, and Arao Nakamura, "Mn-substitution effects on MgB2 superconductor." Yutaka Moritomo's e-mail moritomo@cirse.nagoya-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104534. Key words: MgB2, chemical substitution. 74.70.Ad.

H. D. Yang, J.-Y. Lin, H. H. Li, F. H. Hsu, C. J. Liu, and Changqi Jin, "Order parameter of MgB_2: a fully gapped superconductor." J.-Y. Lin's e-mail ago@cc.nctu.edu.tw; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104574.

D. P. Young, P. W. Adams, J. Y. Chan, and F. R. Fronczek, "Structure and Superconducting Properties of 'BeB_2'." Submitted to Phys. Rev. Lett. P. W. Adams' e-mail adams@rouge.phys.lsu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104063.

H. Y. Zhai, H. M. Christen, L. Zhang, M. Paranthaman, P. H. Fleming, and D. H. Lowndes, "Degradation of superconducting properties in MgB2 films by exposure to water." E-mail zhai@solid.ssd.ornl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104309.

Z. W. Zhao, H. H. Wen, S. L. Li, Y. M. Ni, H. P. Yang, W. N. Kang, H. J. Kim, E. M. Choi, and S. I. Lee, "Smearing of Superconducting Critical Current Density by Dense and Small Flux Jumps in MgB_2 Thin Films." Submitted to Phys. Rev. Lett. H. H. Wen's e-mail hhwen@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104249.

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May 2001 Preprints

K. D. Belashchenko, V. P. Antropov, and S. N. Rashkeev, "Anisotropy of p states and 11B nuclear spin-lattice relaxation in (Mg,Al)B2." E-mail kdbel@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105356.

Gabriel Bester and Manfred Fahnle, "Ab-initio investigation of the covalent bond energies in the metallic covalent superconductor MgB2 and in AlB2." Submitted to Phys. Rev. B. E-mail gb@mf.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105107.

A. Brinkman, D. Veldhuis, D. Mijatovic, G. Rijnders, D. H. A. Blank, H. Hilgenkamp, and H. Rogalla, "Superconducting Quantum Interference Device based on MgB2 nanobridges." Submitted to Appl. Phys. Lett. E-mail a.brinkman@tn.utwente.nl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105535.

E. Cappelluti, S. Ciuchi, C. Grimaldi, L. Pietronero, and S. Strassler, "High T_c superconductivity in MgB_2 by nonadiabatic pairing." E-mail emmcapp@pil.phys.uniroma1.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105351.

G. C. Che, S. L. Li, Z. A. Ren, L. Li, S. L. Jia, Y. M. Ni, H. Chen, C. Dong, J. Q. Li, H. H. Wen, and Z. X. Zhao, "Preparation and Superconductivity of a MgB2 Superconducting Tape." Z. A. Ren's e-mail renzhian@ssc.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105215.

X. K. Chen, M. J. Konstantinovic, J. C. Irwin, D. D. Lawrie, and J. P. Franck, "Evidence for Two Superconducting Gaps in MgB_2." Preprint available at http://xxx.lanl.gov/abs/cond-mat/0104005.

M. R. Cimberle, M. Novak, P. Manfrinetti, and A. Palenzona, "Magnetic characterization of sintered MgB2 samples: effect of the substitution or doping with Li, Al and Si." M. Novak's e-mail novakml@fzu.cz; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105212.

F. Cordero, R. Cantelli, G. Giunchi and S. Ceresara, "A search for incipient lattice instabilities in MgB_{2} by anelastic spectroscopy." Submitted to Phys. Rev. B. E-mail cordero@idac.rm.cnr.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105157.

O. F. de Lima, C. A. Cardoso, R. A. Ribeiro, M. A. Avila, and A. A. Coelho, "Angular dependence of the bulk nucleation field Hc2 of aligned MgB2 crystallites." E-mail delima@ifi.unicamp.br; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105332.

F. Giubileo, D. Roditchev, W. Sacks, R. Lamy, and J. Klein, "Strong Coupling and Double Gap Density of States in Superconducting MgB2." E-mail filgiu@gps.jussieu.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105146.

F. Giubileo, D. Roditchev, W. Sacks, R. Lamy, D. X. Thanh, J. Klein, S. Miraglia, D. Fruchart, and Ph. Monod, "Two Gap State Density in MgB_{2}: A True Bulk Property or A Proximity Effect?" E-mail filgiu@gps.jussieu.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105592.

R. S. Gonnelli, A. Calzolari, D. Daghero, G. A. Ummarino, V. A. Stepanov, G. Giunchi, S. Ceresara, and G. Ripamonti, "Josephson effect in MgB_2 break junctions." E-mail gonnelli@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105241.

J. Hlinka, I. Gregora, J. Pokorny, A. Plecenik, P. Kus, L. Satrapinsky and S. Benacka, "Phonons in MgB2 by Polarized Raman Scattering on Single Crystals." E-mail hlinka@fzu.cz; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105275.

S. S. Indrakanti, V. F. Nesterenko, M. B. Maple, N. A. Frederick, W. M. Yuhasz, and Shi Li, "Hot isostatic pressing of bulk magnesium diboride: superconducting properties." Submitted to Physica C. N. A. Frederick's e-mail neil@physics.ucsd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105485.

A.K.M.A. Islam and F N Islam, "Ab Initio Investigation of Elastic Constants of Superconducting MgB2." Physica C (2001). Tel. 0088 0721 750980; Fax 0088 0721 750064; e-mail azharislam46@yahoo.com. Key words: ab initio method; elastic constants; MgB2.

A.K.M.A. Islam, F N Islam and S Kabir, "Ab Initio Investigation of Mechanical Behaviour of MgB_2 Superconductor under Pressure." Submitted to J. Physics: Condens. Matter. Tel. 0088 0721 750980; Fax 0088 0721 750064; e-mail azharislam46@yahoo.com. Key words: MgB2; ab initio method; Bulk modulus; Pressure derivative of bulk modulus, phonon modes.

C. U. Jung, M.-S. Park, W. N. Kang, M.-S. Kim, S. Y. Lee, and S.-I. Lee, "Temperature- and Magnetic-field-dependent Resistivity of MgB2 Sintered at High-temperature and High-pressure Condition." To be published in Physica C (in press). Contact S.-I. Lee, Department of Physics, National Creative Research Initiative Center for Superconductivity, Pohang University of Science and Technology, Pohang 790-784, SOUTH KOREA; fax +82 54 279 5299; e-mail silee@postech.ac.kr. Key words: MgB2, high pressure, magnesium diboride. 74.25.Fy; 74.60.-w; 74.70.Ad; 74.72.-h.

J. H. Jung, K. W. Kim, H. J. Lee, M. W. Kim, T. W. Noh, W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, C. U. Jung, and Sung-Ik Lee, "Far-infrared transmission studies of c-axis oriented superconducting MgB2 thin film." E-mail hoon@phya.snu.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105180.

W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, Kijoon H. P. Kim, and Sung-Ik Lee, "In-plane Hall effect in c-axis-oriented MgB2 thin films." E-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105024.

Hyeong-Jin Kim, W. N. Kang, Eun-Mi Choi, Mun-Seog Kim, Kijoon H.P. Kim, and Sung-Ik Lee, "High current-carrying capability in c-axis-oriented superconducting MgB2 thin films." W. N. Kang's e-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105363.

A. Knigavko and F. Marsiglio, "Constraints from T_c and the isotope effect for MgB_2." E-mail knigavko@cc.nctu.edu.tw; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105512.

K. Kobayashi and K. Yamamoto, "Electronic Structures of MgB{_2} under Uniaxial and Hydrostatic Compression." Submitted to J. Phys. Soc. Jpn. E-mail kobayashi.kazuaki@nims.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105231.

Wei Ku, W.E. Pickett, R.T. Scalettar, and A.G. Eguiluz, "Ab Initio Investigation of Collective Charge Excitations in MgB_2." E-mail weiku@physics.ucdavis.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105389.

K. Kunc, I. Loa, K. Syassen, R. K. Kremer, and K. Ahn, "MgB_2 under pressure: phonon calculations, Raman spectroscopy, and optical reflectance." I. Loa's e-mail loa@servix.mpi-stuttgart.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105402.

D. Lampakis, A. Tatsi, E. Liarokapis, G. Varelogiannis, P.M. Oppeneer, M. Pissas, T. Nishizaki, "Strong-coupling superconductivity due to soft boson modes in MgB_2, cuprates, borocarbides and some heavy fermions." Submitted to Phys. Rev. Lett. G. Varelogiannis' e-mail varelogi@iesl.forth.gr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105447.

S. Lee, H. Mori, T. Masui, Yu. Eltsev, A. Yamamoto, and S. Tajima, "Growth, structure analysis and anisotropic superconducting properties of MgB2 single crystals." E-mail lee@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105545.

Sang Young Lee, J. H. Lee, Jung Hun Lee, J. S. Ryu, J. Lim, S. H. Moon, H. N. Lee, H. G. Kim, and B. Oh, "Significant Reduction of the Microwave Surface Resistance of MgB2 Films by Surface Ion Milling." E-mail jaju@kkucc.konkuk.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105327.

D. Manske, C. Joas, I. Eremin, and K. H. Bennemann, "Eliashberg-like theory for superconductivity in MgB_2." I. Eremin's e-mail ieremin@physik.fu-berlin.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105507.

H. Martinho, A. A. Martin, C. Rettori, O. F. de Lima, P. G. Pagliuso, N. O. Moreno and J. L. Sarrao, "Evidence for a resonant behavior of the E_{2g} phonon in MgB_{2}." E-mail hercules@ifi.unicamp.br; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105204.

E. Nishibori, M. Takata, M. Sakata, H. Tanaka, T. Muranaka, and J. Akimitsu, "Bonding Nature in MgB_{2}." Submitted to JPSJ Letters. M. Takata's e-mail takata@nuap.nagoya-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105555. Keywords: MgB_2, Superconductivity, Bonding Nature, Charge Density, Synchrotron Radiation, Maximum Entropy Method.

Mi-Ae Park, Kerim Savran, and Yong-Jihn Kim, "A New Method of Probing the Phonon Mechanism in Superconductors including \rm{MgB_{2}}." Yong-Jihn Kim's e-mail yjkim@fen216.fen.bilkent.edu.tr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105091.

Eva Pavarini and I. I. Mazin, "NMR relaxation rates and Knight shifts in MgB2." I. I. Mazin's e-mail mazin@dave.nrl.navy.mil; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105350.

A. Plecenik, L. Satrapinsky, P. Kus, S. Gazi, S. Benacka, I. Vavra, and I. Kostic, "MgB2 superconductor thin films on Si and Al2O3 substrates." E-mail plecenik@savba.sk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105612.

Matthias Schneider, Dieter Lipp, Alexander Gladun, Peter Zahn, Axel Handstein, Guenter Fuchs, Stefan-Ludwig Drechsler, Manuel Richter, Karl-Hartmut Mueller, and Helge Rosner, "Heat and Charge Transport Properties of MgB2." E-mail schneid@physik.phy.tu-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105429.

Keshav N. Shrivastava, "Penetration Depth in Superconducting MgB2." Submitted to Physica C. School of Physics, University of Hyderabad, Hyderabad 500 046, India; tel. +91 40 3010811; fax +91 40 3010145; e-mail knssp@uohyd.ernet.in. Key words: gap symmetry, penetration depth, MgB2.

V. M. Silkin, E. V. Chulkov, and P. M. Echenique, "Surface and Image-Potential States on the MgB_2(0001) Surfaces." Preprint available at http://xxx.lanl.gov/abs/cond-mat/0105628.

G. K. Strukova, V. F. Degtyareva, D. V. Shovkun, V. N. Zverev, V. M. Kiiko, A. M. Ionov, and A. N.Chaika, "Superconductivity in the Re-B system." E-mail strukova@issp.ac.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105293.

P. Szabo, P. Samuely, J. Kacmarcik, Th. Klein, J. Marcus, D. Fruchart, S. Miraglia, C. Marcenat, and A.G.M. Jansen, "Evidence for two superconducting energy gaps in MgB2 by point-contact spectroscopy." E-mail pszabo@labs.polycnrs-gre.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105598.

V. G. Tissen, M. V. Nefedova, N. N. Kolesnikov, and M. P. Kulakov, "Effect of pressure on the superconducting Tc of MgB2." E-mail tissen@issp.ac.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105475.

M. Xu, H. Kitazawa, Y. Takano, J. Ye, K. Nishida, H. Abe, A. Matsushita, and G. Kido, "Single crystal MgB2 with anisotropic superconducting properties." E-mail xu.mingxiang@nims.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105271.

Y. Y. Xue, R. L. Meng, B. Lorenz, J. K. Meen, Y. Y. Sun, and C. W. Chu, "Nonstoichiometry, Defects and Transport Properties in MgB2." Submitted to Phys. Rev. B. C. W. Chu's e-mail tchristensen@uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105478.

X. H. Zeng, A. Sukiasyan, X. X. Xi, Y. F. Hu, E. Wertz, Qi Li, W. Tian, H. P. Sun, X. Q. Pan, J. Lettieri, D. G. Schlom, C. O. Brubaker, Zi-Kui Liu, and Qiang Li, "Superconducting properties of nanocrystalline MgB_2 thin films made by an {\em in situ} annealing process." X. X. Xi's e-mail xxx4@psu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105080.

Y. G. Zhao, X. P. Zhang, P. T. Qiao, H. T. Zhang, S. L. Jia, B. S. Cao, M. H. Zhu, Z. H. Han, X. L. Wang, and B. L. Gu, "Influence of the starting composition on the structural and superconducting properties of MgB2 phase." E-mail ygzhao@tsinghua.edu.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105053.

Y. Zhu, L. Wu, V. Volkov, Q. Li, G. Gu, A. R. Moodenbaugh, M. Malac, M. Suenaga, and J. Tranquada, "Microstructure and Structural Defects in MgB2 Superconductor." E-mail zhu@bnl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105311.

V. P. Zhukov, V. M. Silkin, E. V. Chulkov, and P. M. Echenique, "Dielectric functions and collective excitations in MgB_2." Submitted to Phys. Rev. B. E-mail waxslavs@sc.ehu.es; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105461. Key words: MgB_2, dielectric function, plasmon. 74.70.Ad; 71.45.Gm; 74.24.Jb.

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June 2001 Preprints

A. Berenov, Z. Lockman, X. Qi, Y. Bugoslavsky, L. F. Cohen, M.-H. Jo, N. A. Stelmashenko, V. N. Tsaneva, M. Kambara, N. Hari Babu, D. A. Cardwell, M. G. Blamire, and J. L. MacManus-Driscoll, "Growth of Strongly Biaxially Aligned MgB2 Thin Films on Sapphire by Post-annealing of Amorphous Precursors." Submitted to Appl. Phys. Lett. E-mail mb52@cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106278.

P. Bordet, M. Mezouar, M. Nunez-Regueiro, M. Monteverde, M. D. Nunez-Regueiro, N. Rogado, K. A. Regan, M. A. Hayward, T. He, S. M. Loureiro, and R. J. Cava, "Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry." Phys. Rev. B accepted. M. Nunez-Regueiro's e-mail nunezreg@labs.polycnrs-gre.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106585.

S. L. Bud'ko, V. G. Kogan, and P. C. Canfield, "Determination of superconducting anisotropy from magnetization data on random powders as applied to LuNi_2B_2C, YNi_2B_2C and MgB_2." E-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106577.

G. Burnell, D.-J. Kang, H.N. Lee, S.H. Moon, B. Oh, and M.G. Blamire, "Planar Superconductor-Normal-Superconductor Josephson Junctions in MgB2." E-mail gb119@cus.cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106562.

S. Deemyad, J. S. Schilling, J. D. Jorgensen, and D. G. Hinks, "Dependence of the Superconducting Transition Temperature of MgB2 on Pressure to 20 Gpa." E-mail schill@wuphys.wustl.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106057.

N. A. Frederick, Shi Li, M. B. Maple, V. F. Nesterenko, and S. S. Indrakanti, "Improved superconducting properties of MgB2." E-mail neil@physics.ucsd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106518.

W. Goldacker, S. I. Schlachter, S. Zimmer, and H. Reiner, "High transport currents in mechanically reinforced MgB2 wires." Submitted to Supercond. Science and Technol. S. I. Schlachter's e-mail sonja.schlachter@itp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106226.

A. F. Goncharov, V. V. Struzhkin, E. Gregoryanz, H. K. Mao, R. J. Hemley, G. Lapertot, S. L. Bud'ko, P. C. Canfield, and I. I. Mazin, "Pressure Dependence of the Raman Spectrum, Lattice Parameters and Superconducting Critical Temperature of MgB2." E-mail goncharov@gl.ciw.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106258.

Izumi Hase and Kunihiko Yamaji, "Nesting properties and anomalous band effect in MgB2." To be published in J. Phys. Soc. Jpn. 70_, No.8. E-mail i.hase@aist.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106620.

J. E. Hirsch, "Hole Superconductivity in MgB_2, Cuprates, and Other Materials." To be published in Studies of High Temperature Superconductors, ed. by A. Narlikar, Nova Sci. Pub., New York. E-mail jhirsch@ucsd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106310; for easier to read camera-ready manuscript see http://physics.ucsd.edu/~jorge/studies.pdf.

M. H. Jung, M. Jaime, A. H. Lacerda, G. S. Boebinger, W. N. Kang, H. J. Kim, E. M. Choi, and S. I. Lee, "Anisotropic Superconductivity in Epitaxial MgB2 Films." Chem. Phys. Lett., in press. M. Jaime's e-mail mjaime@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106146.

Alain Junod, Yuxing Wang, Frederic Bouquet, and Pierre Toulemonde, "Specific heat of the 38-K superconductor MgB_2 in the normal and superconducting state: bulk evidence for a double gap." Chapter for Studies of High Temperature Superconductors Vol. 38, Ed. A. Narlikar, Nova Publishers, Commack (N.Y.). E-mail alain.junod@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106394.

R. A. Kaindl, M. A. Carnahan, J. Orenstein, D. S. Chemla, H. M. Christen, H. Zhai, M. Paranthaman, and D. H. Lowndes, "Far-infrared optical conductivity gap in superconducting MgB2 films." E-mail rakaindl@lbl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106342.

Kijoon H. P. Kim, Jae-Hyuk Choi, C. U. Jung, P. Chowdhury, Min-Seok Park, Heon-Jung Kim, J. Y. Kim, Zhonglian Du, Eun-Mi Choi, Mun-Seog Kim, W. N. Kang, Sung-Ik Lee, Gun Yong Sung, and Jeong Yong Lee, "Superconducting properties of well-shaped MgB2 single crystal." W. N. Kang's e-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105330.

H. Kitaguchi, H. Kumakura, and K. Togano, "Strain Effect in MgB2/Stainless Steel Superconducting Tape." Submitted to Physica C. E-mail kitaguchi.hitoshi@nims.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106388.

H. Kumakura, A. Matsumoto, H. Fujii, and K. Togano, "High transport critical current density obtained for Powder-In-Tube-processed MgB2 tapes and wires using stainless steel and Cu-Ni tubes." E-mail kumakura.hiroaki@nims.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106002.

S. K. Kwon, S. J. Youn, K. S. Kim, and B. I. Min, "New High Temperature Diboride Superconductors: AgB2 and AuB2." E-mail sekk@nature.postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106483.

F. Laube, G. Goll, J. Hagel, H. v. Lohneysen, D. Ernst, and T. Wolf, "Superconducting energy gap distribution of MgB_2 investigated by point-contact spectroscopy." G. Goll's e-mail gernot.goll@phys.uni-karlsruhe.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106407.

Zhenyu Li, Jinlong Yang, J.G. Hou, and Qingshi Zhu, "A first-principles study of MgB2 (0001) surfaces." Jinlong Yang's e-mail jlyang@ustc.edu.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106590.

C. F. Liu, S. J. Du, G. Yan, Y. Feng et al., "Preparation of 18-filament Cu/NbZr/MgB2 tape with high transport critical current density." E-mail guoyan@21cn.edu.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106061.

F. Manzano and A. Carrington, "Exponential Temperature Dependence of Penetration Depth in MgB_2." A. Carrington's e-mail a.carrington@bris.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106166.

N. Ogita, T. Kariya, K. Hiraoka, J. Nagamatsu, T. Muranaka, H. Takagiwa, J. Akimitsu, and M. Udagawa, "Micro-Raman scattering investigation of MgB2 and RB2 (R=Al, Mn, Nb and Ti)." E-mail ogita@mls.ias.hiroshima-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106147.

D. A. Papaconstantopoulos and M. J. Mehl, "Precise Tight-binding Description of the Band Structure of MgB2." M. J. Mehl's e-mail mehl@dave.nrl.navy.mil; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106408.

P. Postorino, A. Congeduti, P. Dore, A. Nucara, A. Bianconi, D. Di Castro, S. De Negri, and A. Saccone, "Effect of Al doping on the optical phonon spectrum in Mg(1-x)Al(x)B(2)." E-mail postorino@axcasp.caspur.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106356.

M. Putti, E. Galleani d'Agliano, D. Marre, F. Napoli, M. Tassisto, P. Manfrinetti, A. Palenzona, C. Rizzuto, and S. Massidda, "Electron transport properties of MgB2 in the normal state." D. Marre's e-mail marre@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106344.

H. Rosner, W. E. Pickett, S.-L. Drechsler, A. Handstein, G. Behr, G. Fuchs, K. Nenkov, K.-H. Muller, and H. Eschrig, "Electronic structure and weak electron-phonon coupling in TaB_2." Submitted to Phys. Rev. B. S.-L. Drechsler's e-mail s.l.drechsler@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106092.

G. Satta, G. Profeta, F. Bernardini, A. Continenza, and S. Massidda, "Electronic and structural properties of superconducting MgB_2, CaSi_2 and related compounds." Phys. Rev. B in press. G. Profeta's e-mail gianni.profeta@aquila.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106239.

K. J. Song, N. J. Lee, H. M. Jang, H. S. Ha, D. W. Ha, S. S. OH, M. H. Sohn, Y. K. Kwon, and K. S. Ryu, "Single-filament Composite MgB2/SUS Ribbons by Powder-In-Tube Process." E-mail kjsong@keri.re.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106124.

V. V. Struzhkin, A. F. Goncharov, R. J. Hemley, H. K. Mao, G. Lapertot, S. L. Bud'ko, and P. C. Canfield, "Phonon-assisted electronic topological transition in MgB2 under pressure." E-mail struzhkin@gl.ciw.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106576.

HongLi Suo, Concetta Beneduce, Marc Dhalle, Nicolas Musolino, Jean-Yves Genoud, and Rene Flukiger, "Large transport critical currents in dense Fe- and Ni-clad MgB2 superconducting tapes." Concetta Beneduce's e-mail beneduce@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106341.

X. L. Wang, S. Soltanian, J. Horvat, M. J. Qin, H. K. Liu, and S. X. Dou, "Very fast formation of superconducting MgB2/Fe wires with high Jc." Accepted for publication in Physica C. Fax +61 2 42215731; e-mail xiaolin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106148. Key words: Magnesium diboride, rapid fabrication, superconducting wire, critical current. 74.70.Ad.

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July 2001 Preprints

V. P. Antropov, K. D. Belashchenko, M. van Schilfgaarde, and S. N. Rashkeev, "Electronic Structure, Bonding and Optical Spectrum of MgB2." To be published in Studies of High Temperature Superconductors, ed. by A. Narlikar, Nova Sci. Pub. K. D. Belashchenko's e-mail kdbel@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107123.

D. K. Aswal, Shashwati Sen, Ajay Singh, T.V.C. Rao, J. C. Vyas, L. C. Gupta, S. K. Gupta, and V. C. Sahni, "Synthesis and characterization of MgB2 superconductor." Accepted for publication in Physica C. Technical Physics and Prototype Engineering Division, Bhabha Atomic Research Center, Mumbai - 400 085, India; fax 91-22-5505151; e-mail dkaswal@apsara.barc.ernet.in. Key words: MgB2 superconductor.

M. K. Bhide, R. M. Kadam, M. D. Sastry, Ajay Singh, Shashwati Sen, D. K. Aswal, S. K. Gupta,and V. C. Sahni, " Magnetic field dependent microwave absorption studies of MgB2 superconductor." Accepted for publication in Superconductor Science & Technology. Radiochemistry Division, Physics and Prototype Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai- 400 085, India; S. K. Gupta's e-mail drgupta@magnum.barc.ernet.in. Key words: Hc1, microwave absorption, MgB2.

F. Bouquet, Y. Wang, R. A. Fisher, D. G. Hinks, J. D. Jorgensen, A. Junod, and N. E. Phillips, "Phenomenological two-gap model for the specific heat of MgB_2." A. Junod's e-mail alain.junod@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107196.

X. H. Chen, Y. S. Wang, Y. Y. Xue, R. L. Meng, Y. Q. Wang, and C. W. Chu, "Correlation between the residual resistance ratio and magnetoresistance in MgB2." Submitted to Phys. Rev. B. C. W. Chu's e-mail tchristensen@uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107154.

S. X. Dou, X. L. Wang, J. Horvat, D. Milliken, A. H. Li, K. Konstantinov, E. W. Collings, M. D. Sumption, and H. K. Liu, "Flux Jumping and a Bulk-to-Granular Transition in the Magnetization of a Compacted and Sintered MgB2 Superconductor." To be published in Physica C (in press). Institute of Superconducting and Electronic Materials (ISEM), University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, AUSTRALIA; tel. +61 2 4221 5722; fax +61 2 4221 5731; e-mail jhorvat@uow.edu.au. Key words: magnesium boride, flux jumping, superconductor, critical current.

C. Ferdeghini, V. Ferrando, G. Grassano, W. Ramadan, E. Bellingeri, V. Braccini, D. Marre', P. Manfrinetti, A. Palenzona, F. Borgatti, R. Felici, and T.-L. Lee, "Growth of c-oriented MgB2 thin films by Pulsed Laser Deposition: structural characterization and electronic anisotropy." G. Grassano's e-mail grassano@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107031.

R. A. Fisher, F. Bouquet, N. E. Phillips, D. G. Hinks, and J. D. Jorgensen, "Identification and Characterization of Two Energy Gaps in Superconducting MgB2 by Specific-Heat Measurements." Studies of High Temperature Superconductors, Vol 38, Ed. A. V. Narlikar, Nova Science, NY. E-mail rafisher@collchem.cchem.berkeley.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107072.

R. S. Gonnelli, A. Calzolari, D. Daghero, G. A. Ummarino, V. A. Stepanov, P. Fino, G. Giunchi, S. Ceresara, and G. Ripamonti, "Temperature and junction-type dependency of Andreev reflection in MgB2." SNS 2001 Conference. E-mail gonnelli@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107239.

A.K.M.A. Islam, F. N. Islam, and M. N. Islam, "Electronic Structure and Electric Field Gradient in Superconducting MgB2 under Pressure: An Ab Initio Study." Submitted to J. Physics: Condens. Matter. Fax 0088 0721 750064; e-mail azharislam46@yahoo.com. Key words: MgB2, ab initio method, band structure, electric field gradient, pressure effect.

T. H. Johansen, M. Baziljevich, D. V. Shantsev, P. E. Goa, Y. M. Galperin, W. N. Kang, H. J. Kim, E. M. Choi, M.-S. Kim, and S. I. Lee, "Dendritic magnetic instability in superconducting MgB2 films." Submitted to Phys. Rev. Lett. Y. M. Galperin's e-mail iouri.galperine@fys.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104113; for high-quality MO images see http://www.fys.uio.no/faststoff/ltl/results/biology/index.html.

Chikao Kawabata, Nobuhiko Hayashi, and Fumihisa Ono, "Critical Temperature Tc and Charging Energy Ec between B-B layers of Superconducting diboride materials MgB2 in 3D JJA model." To be published in J. Phys. Soc. Jpn. 70, No.10 (2001). E-mail kawabatact@nifty.com; preprint also available at http://xxx.arXiv.org/abs/cond-mat/0108052. Key words: MgB_2, Josephson Junction Array Model, Ionic Electronic Polarizability, Charging Energy. 74.20.-z; 74.62.-c.

N. Klein, B. B. Jin, J. Schubert, M. Schuster, H. R. Yin, A. Pimenov, A. Loidl, and S. I. Krasnosvobodtsev, "Energy gap and London penetration depth of MgB_2 films determined by microwave resonator measurement." Submitted to Phys. Rev. Lett. E-mail n.klein@fz-juelich.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107259. Key words: microwave surface impedance, London penetration depth, energy gap. 74.25.Nf, 74.70.Ad, 07.57.Pt.

R. F. Klie, J. C. Idrobo, and N. D. Browning, "Direct observation of nm-scale Mg- and B-oxide phases at grain boundaries in MgB2." J. C. Idrobo's e-mail jidrob1@uic.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107324.

N. N. Kolesnikov and M. P. Kulakov, "Synthesis of MgB2 from elements." E-mail nkolesn@issp.ac.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107164.

A. B. Kuz'menko, F. P. Mena, H.J.A. Molegraaf, D. van der Marel, B. Gorshunov, M. Dressel, I. I. Mazin, J. Kortus, O. V. Dolgov, T. Muranaka, and J. Akimitsu, "Manifestation of multiband optical properties of MgB_2." E-mail abk@kapitza.ras.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107092.

F. Marsiglio, "Implications of reflectance measurements on the mechanism for superconductivity in MgB_2." E-mail fmars@phys.ualberta.ca; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107486.

Yu.A. Nefyodov, M. R. Trunin, A. F. Shevchun, D. V. Shovkun, N. N. Kolesnikov, M. P. Kulakov, A. Agliolo Gallitto, and S. Fricano, "Characteristic features of the temperature dependence of the surface impedance in polycrystalline MgB_2 samples." E-mail nefyodov@issp.ac.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107057.

G. Papavassiliou, M. Pissas, M. Fardis, M. Karayanni, and C. Christides, "^{11}B NMR detection of the magnetic field distribution in the mixed superconducting state of MgB_2." M. Pissas' e-mail pissas@ath.forthnet.gr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107511.

A. A. Polyanskii, A. Gurevich, J. Jiang, D. C. Larbalestier, S. L. Bud'ko, D. K. Finnemore, G. Lapertot , P. C. Canfield A. A. Polyanskii, A. Gurevich, J. Jiang, D. C. Larbalestier, S. L. Bud'ko, D. K. Finnemore, G. Lapertot , and P. C. Canfield, "Magneto-optical studies of the uniform critical state in bulk MgB2." A. Gurevich's e-mail agourevi@facstaff.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107532.

M. J. Qin, X. L. Wang, H. K. Liu, S. X. Dou, "Evidence for Transition Temperature Fluctuation Induced Pinning in MgB2 Superconductor." Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia; e-mail qin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108172. Key words: MgB2, critical current density, \delta T_chBcpinning, \delta lhBcpinning. 74.70.Ad, 74.60.-w, 74.25.Ha, 74.25.Dw.

J. W. Quilty, S. Lee, A. Yamamoto and S. Tajima, "The Superconducting Gap in MgB_2: Electronic Raman Scattering Measurements of Single Crystals." E-mail quilty@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107216.

S. Reich, G. Leitus, and I. Felner, "On the Magnetism of the Normal State in MgB2." G. Leitus' e-mail leitus@wicc.weizmann.ac.il; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107169.

N. Rogado, M. A. Hayward, K. A. Regan, Yayu Wang, N. P. Ong, John M. Rowell, and R. J. Cava, "Low Temperature Fabrication of MgB2." Submitted to Journal of Applied Physics. E-mail nsrogado@princeton.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107534.

S. I. Schlachter, W. H. Fietz, K. Grube, and W. Goldacker, "High Pressure Studies of Tc and Lattice Parameters of MgB2." ICMC Madison July 16-20, 2001. E-mail sonja.schlachter@itp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107205.

T. C. Shields, K. Kawano, D. Holdom, and J. S. Abell, "Microstructure and superconducting properties of hot isostatically pressed MgB2." E-mail t.c.shields@bham.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107034.

J. J. Tu, G. L. Carr, V. Perebeinos, C. C. Homes, M. Strongin, P. B. Allen, W. N. Kang, E. M. Choi, H. J. Kim, and Sung-Ik Lee, "Optical studies of charge dynamics in c-axis oriented superconducting MgB2 films." Submitted to Phys. Rev. Lett. E-mail jtu@bnl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107349.

Y. Zhang, D. Kinion, J. Chen, D. G. Hinks, G. W. Crabtree and John Clarke, "MgB2 tunnel junctions and 19 K low-noise dc superconducting quantum interference devices." D. Kinion's e-mail kinion1@llnl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107478.

X. H. Zheng, "BCS Theory for Binary Systems with 2D Electrons." E-mail xhz@queens-belfast.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107634.

A. A. Zhukov, L. F. Cohen, A. Purnell, Y. Bugoslavsky, A. Berenov, J. L. MacManus-Driscoll, H. Y. Zhai, Hans M. Christen, Mariappan P. Paranthaman, Douglas H. Lowndes, M. A. Jo, M. C. Blamire, Ling Hao, and J. Gallop, "Temperature dependence of the microwave surface impedance measured on different kinds of MgB_2 samples." E-mail a.zhukov@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0107240.

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August 2001 Preprints

D. K. Aswal, K. P. Muthe, Ajay Singh, Shashwati Sen, K. Shah, L. C. Gupta, S. K. Gupta, and V. C. Sahni, "Degradation behavior of MgB2 superconductor." To be published in Physica C (in press). Technical Physics and Prototype Engineering Division, Bhabha Atomic Research Center, Mumbai 400 085, India; fax 91-22-5505151; e-mail dkaswal@apsara.barc.ernet.in. Key words: MgB2 superconductor, X-ray photoelectron spectroscopy, degradation behavior. 74.70.Ad.

Cristina Buzea and Tsutomu Yamashita, "Review of superconducting properties of MgB2." Topical Review of papers appeared since January until July 2001 on MgB2. E-mail cristi@riec.tohoku.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108265.

G. Carapella, N. Martucciello, G. Costabile, C. Ferdeghini, V. Ferrando, and G. Grassano, "Josephson effect and tunneling spectroscopy in Nb/Al2O3/Al/MgB2 thin films junctions." E-mail giocar@sa.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108212.

O. F. de Lima, "Studies on the Anisotropic Properties of MgB2." To appear as a chapter in "Studies of High Temperature Superconductors", Vol. 38, p. 263, ed. A.V. Narlikar (Nova Sci. Publ., New York, 2001). E-mail delima@ifi.unicamp.br; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108093.

A. Dulcic, D. Paar, M. Pozek, G. V. M. Williams, S. Kramer, C. U. Jung, Min-Seok Park, and Sung-Ik Lee, "A Magnetization and Microwave Study of Superconducting MgB2." Submitted to Phys. Rev. B. G. V. M. Williams' e-mail g.williams@physik.uni-stuttgart.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108071.

T. H. Johansen, M. Baziljevich, D. V. Shantsev, P. E. Goa, Y. M. Galperin, W. N. Kang, H. J. Kim, E. M. Choi, M.-S. Kim, and S. I. Lee, "Dendritic flux patterns in MgB2 films." Accepted to Supercond. Sci. Technol. D. V. Shantsev's e-mail daniel.shantsev@fys.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108092.

H. Kumakura, Y. Takano, H. Fujii, K. Togano, H. Kito, and H. Ihara, "Critical Current Densities and Irreversibility Fields of MgB2 Bulks." To be published in Physica C (in press). National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, JAPAN; tel. 81 298 59 2327; fax 81 298 59 2301; e-mail kumakura.hiroaki@nims.go.jp. Key words: grain coupling, flux pinning, grain boundary.

J. Nakamura, N. Yamada, K. Kuroki, T. A. Callcott, D. L. Ederer, J. D. Denlinger, and R.C.C. Perera, "Soft x-ray spectroscopy experiments on the near K-edge of B in MB2 (M=Mg, Al, Ta, and Nb)." Accepted for publication to Phys. Rev. B. E-mail jin@pc.uec.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108215.

R. Nast, S. I. Schlachter, S. Zimmer, H. Reiner, and W. Goldacker, "Mechanically reinforced MgB2 wires and tapes with high transport currents." Submitted to Physica C (Proceedings of EUCAS 2001). S. I. Schlachter's e-mail sonja.schlachter@itp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108458.

Ch. Niedermayer, C. Bernhard, T. Holden, R. K. Kremer, and K. Ahn, "Muon-spin-relaxation study of the magnetic penetration depth in MgB2." E-mail christof.niedermayer@uni-konstanz.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108431.

M. Pissas, E. Moraitakis, D. Stamopoulos, G. Papavassiliou, V. Psycharis, and S. Koutandos, "Surface barrier and bulk pinning in MgB_2 superconductor." E-mail pissas@ath.forthnet.gr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108153.

R. Prozorov, R. W. Giannetta, S. L. Bud'ko, and P. C. Canfield, "Energy gap and proximity effect in MgB_2 superconducting wires." E-mail prozorov@uiuc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108107.

M. Rajagopalan, P. Selvamani, G. Vaitheeswaran, V. Kanchana, and M. Sundareswari, "Calculation of superconducting transition temperature of MgB2." Accepted for publication in Solid State Communications. Tel. +91-44-2213023; e-mail mraja@eth.net or mrajagopalan@lycos.com. Key words: Superconductor Electron Phonon interactions Phonons.

L. M. Volkova, S. A. Polyshchuk, S. A. Magarill, and F. E. Herbeck, "Crystal Chemical Estimation of Possible Exceeding of Tc 77K in Diborides." Institute of Chemistry, Far Eastern Branch of Russian Academy of Science, 159, 100-Let Prosp., Vladivostok 690022, Russia; telephone:(4232)311636; e-mail volkova@chemi.ich.dvo.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108295. Key words: diboride; MgB2; superconducting transition temperature; crystal chemical correlation.

H. H. Wen, S. L. Li, Z. W. Zhao, H. Jin, Y. M. Ni, W. N. Kang, H. J. Kim, E. M. Choi, and S. I. Lee, "Magnetic relaxation and critical current density of MgB_2 thin films." Phys. Rev. B 64, 1045xx (2001). S. L. Li's e-mail slli@ssc.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0108294.

Z. W. Zhao, S. L. Li, Y. M. Ni, H. P. Yang, Z. Y. Liu, H. H. Wen, W. N. Kang, H. J. Kim, E. M. Choi, and S. I. Lee, "Suppression of Superconducting Critical Current Density by Many Small Flux Jumps in MgB_2 Thin Films." H. H. Wen's e-mail hhwen@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0104249.

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September 2001 Preprints

A. Andreon, A. Cassinese, C. Cantoni, E. Di Gennaro, G. Lamura, M. G. Maglione, M. Paranthaman, M. Salluzzo, and R. Vaglio, "Study of the microwave electrodynamic response of MgB2 thin films." Proceedings of the conference EUCAS 2001; submitted to Physica C. M. Salluzzo's e-mail salluzzo@na.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109465.

N. L. Bobrov, P. N. Chubov, Yu. G. Naidyuk, L.V. Tyutrina, I. K. Yanson, W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, and Sung-Ik Lee, "Superconducting gap and electron-phonon interaction in MgB_2 thin film studied by point contacts." Presented at the NATO ARW New Trends in Superconductivity, Yalta, Ukraine, 16-20 Sept. 2001. Yu. G. Naidyuk's e-mail NAIDYUK@ilt.kharkov.ua; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110006.

C. Ferdeghini, V. Ferrando, G. Grassano, W. Ramadan, V. Braccini, M. Putti , P. Manfrinetti, and A. Palenzona, "Transport properties of c-oriented MgB2 thin films grown by Pulsed Laser Deposition." Presented at EUCAS 2001; submitted to Physica C. E-mail ferdeghini@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109481.

C. Ferdeghini, V. Ferrando, G. Grassano, W. Ramadan, E. Bellingeri, V. Braccini, D. Marre, M. Putti , P. Manfrinetti, A. Palenzona, F. Borgatti , R. Felici, and C. Aruta, "Anisotropy in c-oriented MgB2 thin films grown by Pulsed Laser Deposition." Presented at ISS 2001, Kobe, Japan; submitted to Physica C. E-mail ferdeghini@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109536.

B. A. Glowacki and M. Majoros, "MgB2 conductors for dc and ac applications." Paper presented at EUCAS'01 conference, Copenhagen, 26-30 August 2001. M. Majoros' e-mail mm293@cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109114.

B. A. Glowacki, M. Majoros, M. E. Vickers, and B. Zeimetz, "Superconducting properties of the powder-in-tube Cu-Mg-B and Ag-Mg-B wires." Paper presented at EUCAS'01 conference, Copenhagen, 26 - 30 August 2001. M. Majoros' e-mail mm293@cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109085.

T. He, John M. Rowell, and R. J. Cava, "The Reactivity of MgB2 with Common Substrate and Electronic Materials." E-mail taohe@phoenix.princeton.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109370.

J. Horvat, X. L. Wang, S. Soltanian, and S. X. Dou, "Improvement of critical current in MgB2/Fe wires by a ferromagnetic sheath." E-mail jhorvat@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109283.

V. A. Ivanov, M. van den Broek, and F. M. Peeters, "Strongly interacting \sigma -electrons and MgB_{2} superconductivity." M. van den Broek's e-mail martijn.vandenbroek@ua.ac.be; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109347.

Chikao Kawabata, Nobuhiko Hayashi, and Fumihisa Ono, "Critical Temperature T_c versus Charging Energy E_c in MgB2 and C60/CHBr3." Submitted to Physica C; Proceedings of International Symposium on Superconductivity ISS2001, Kobe, Sep. 2001. Faculty of Environmental Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan; e-mail kawabatact@nifty.com; preprint also available at http://xxx.arXiv.org/abs/cond-mat/0109251. Key words: MgB2, C60/CHBr3, Josephson Junction Array model, Electric polarizability, Charging energy. 74.62.-c, 74.62.Bf.

A. Lascialfari, T. Mishonov, A. Rigamonti, P. Tedesco, and A. Varlamov, "Superconducting Diamagnetic Fluctuations in MgB2." Submitted to Phys. Rev. Lett. E-mail lascialfari@nmrserver.unipv.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109404.

D. Manske, C. Joas, I. Eremin, and K. H. Bennemann, "Theory for phonon-induced superconductivity in MgB_2." I. Eremin's e-mail ieremin@physik.fu-berlin.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105507.

Frank J. Owens, "Electron Paramagnetic Resonance and Surface Resistance Measurements in MgB2 and Mg1-xLixB2." Accepted for publication in Physica C. E-mail fowens@pica.army.mil. Key words: surface resistance, electron paramagnetic resonance, MgB2.

A. Pimenov, A. Loidl, and S. I. Krasnosvobodtsev, "Superconducting energy gap in MgB2 film observed by infrared reflectance." E-mail andrei.pimenov@physik.uni-augsburg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109449.

T. A. Prikhna, W. Gawalek, A. B. Surzhenko, N. V. Sergienko, V. E. Moshchil, T. Habisreuther, V. S. Melnikov, S. N. Dub, P. A. Nagorny, M. Wendt, Ya. M. Savchuk, D. Litzkendorf, J. Dellith, S. Kracunovska, and Ch. Schmidt, "The high-pressure synthesis of MgB2." A. B. Surzhenko's e-mail surzhenko@ipht-jena.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109216.

M. Putti, E. Galleani d'Agliano, D. Marre, F. Napoli, M. Tassisto, P. Manfrinetti, and A. Palenzona, "Transport properties of MgB2." In print in Studies of High Temperature Superconductors Ed. A.Narlikar, Vol. 38. E-mail putti@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109174.

I. R. Shein and A. L. Ivanovskii, "The band structure of hexagonal diborides ZrB2, VB2, NbB2 and TaB2 in comparison with the superconducting MgB2." E-mail shein@ihim.uran.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109445.

P. Szabo, P. Samuely, A.G.M. Jansen, T. Klein, J. Marcus, D. Fruchart, and S. Miraglia, "Magnetotransport and the upper critical magnetic field in MgB2." P. Samuely's e-mail samuely@saske.sk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109211.

R. C. Yu, S. C. Li, Y. Q. Wang, X. Kong, J. L. Zhu, F. Y. Li, Z. X. Liu, X. F. Duan, Z. Zhang, and C. Q. Jin, "EELS Studies of MgB2 Superconductors Obtained under High Pressure." To be published in Physica C (in press). Laboratory for Extreme Condition Physics, Institute of Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, CHINA; tel. 86 10 82649163; fax 86 10 82649531; e-mail rcyu@aphy.iphy.ac.cn. Key words: superconductivity, MgB2, electron energy-loss spectroscopy, high pressure. 74.70.Ad; 79.20.Uv; 62.50.+p.

A. A. Zhukov, A. Purnell, Y. Miyoshi, Y. Bugoslavsky, Z. Lockman, A. Berenov, J. L. MacManus-Driscoll, L. F. Cohen, H. Y. Zhai, H. M. Christen, M. P. Paranthaman, D. H. Lowndes, M. H. Jo, M. G. Blamire, Ling Hao, and J. C. Gallop, "Microwave Power, dc Magnetic Field, Frequency and Temperature Dependence of the Surface Resistance of MgB2." A. Purnell's e-mail a.purnell@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0109397.

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October 2001 Preprints

A. S. Alexandrov, "Nonadiabatic polaronic superconductivity in MgB2 and cuprates." To be published in Physica C (in press). Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom; tel. 44 1509 223303; fax 44 1509 223986; e-mail a.s.alexandrov@lboro.ac.uk. Key words: magnesium-diboride, polarons, London penetration depth, Fermi energy. 74.20.-z; 74.20.Mn; 71.38.-k.

I. N. Askerzade, A. Gencer, and N. G. Al, " On the Ginzburg-Landau analysis of the upper critical field Hc2 in MgB2." Submitted to Supercond. Sci. and Technol. in November 2001. A. Gencer, Ankara University, Faculty of Sciences, Physics Department, 06100-Tandogan/Ankara-Turkey; e-mail gencer@science.ankara.edu.tr. Keywords: Superconductivity, Macroscopic Theory, The Upper Critical Field Hc2, Two-Band Superconductivity, Positive Curvature.

Mohamed H. Badr, Mario Freamat, Yuri Sushko, and K.-W. Ng, "Temperature and Field Dependence of the Energy Gap of MgB2/Pb planar junction." Submitted to Phys. Rev. B. Mario Freamat's e-mail mario@pa.uky.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110421.

Y. Bugoslavsky, Y. Miyoshi, G. K .Perkins, A. V. Berenov, Z. Lockman, J. L. MacManus-Driscoll, L. F. Cohen, A. D. Caplin, H. Y. Zhai, M. P. Paranthaman, H. M. Christen, and M. Blamire, "The structure of the superconducting gap in MgB2 from point-contact spectroscopy." E-mail y.bugoslav@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110296.

H. Fujii, H. Kumakura, and K. Togano, "Influence of MgB2 powder quality on the transport properties of Cu-sheathed MgB2 tapes." To be published in Physica C (in press). Materials Engineering Laboratory, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; tel. 81 298 59 2326; fax 81 298 59 2301; e-mail fujii.hiroki@nims.go.jp. Key words: microstructure, grain connectivity, critical current density. 74.72.Hs; 85.25.K.

A. P. Gerashenko, K. N. Mikhalev, S. V. Verkhovskii, A. E. Karkin, and B. N. Goshchitskii, "Reduction in the electron density-of-states in superconducting MgB_2 disordered by n^1-irradiation: the ^{11}B and ^{25}Mg NMR estimates." E-mail Gerashenko@imp.uran.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110158.

W. Goldacker and S. I. Schlachter, "Influence of mechanical reinforcement of MgB2 wires on the superconducting properties." Submitted to Physica C; presentation at ISS-2001, Kobe Japan. S. I. Schlachter's e-mail sonja.schlachter@itp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110231.

Tomoko Goto and Hisayuki Katoh, "Preparation of filamentary MgB2 superconductors by suspension spinning method." Preprint ICMC2001. E-mail zwgoto@mse.nitech.ac.jp. Key words: Filamentary MgB2 suspension spinning. 85.25.Kx.

S. Y. Li, Y. M. Xiong, W. Q. Mo, R. Fan, C. H. Wang, X. G. Luo, Z. Sun, H. T. Zhang, L. Li, L. Z. Cao, and X. H. Chen, "Alkali metals substitution effects in Mg1-xAxB2 (A = Li and Na)." To be published in Physica C (in press). Contact X. H. Chen, Department of Physics, Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China; tel. 86 551 360 1654; fax 86 551 360 1073; e-mail chenxh@ustc.edu.cn. Key words: MgB2, substitution, magnetic susceptibility. 74.70.Ad; 74.62.Dh; 74.60.Jg.

B. Lorenz, Y. Y. Xue, R. L. Meng, and C. W. Chu, "Superconductivity in pure and electron doped MgB2: Transport properties and pressure effects." Presented at NATO Advanced Research Workshop New Trends in Superconductivity, Yalta (Ukraine) 16-20 September, 2001. E-mail blorenz@bayou.uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110125.

F. Manzano, A. Carrington, N. E. Hussey, S. Lee, and A. Yamamoto, "Exponential Temperature Dependence of Penetration Depth in Single Crystal MgB_2." Submitted to PRL August 7th, 2001. A. Carrington's e-mail a.carrington@bris.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110109.

K. P. Meletov, J. Arvanitidis, M. P. Kulakov, N. N. Kolesnikov and G. A. Kourouklis, "Raman spectra of MgB2 at high pressure and topological electronic transition." G. A. Kourouklis' e-mail gak@eng.auth.gr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110511.

A. Plecenik, L. Satrapinsky, P. Kus, S. Gazi, S. Benacka, I. Vavra, and I. Kostic, "MgB2 superconducting thin films on Si and Al2O3 substrates." To be published in Physica C (in press). Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 84239 Bratislava, Slovak Republic; tel. 421 7 5477 5823x2240; fax 421 7 5477 5816; e-mail plecenik@savba.sk. Key words: MgB2, superconductivity, thin films. 74.72.Yg; 74.76.-w.

J. S. Schilling, J. D. Jorgensen, D. G. Hinks, S. Deemyad, J. Hamlin, C. W. Looney, and T. Tomita, "Hydrostatic Pressure Dependence of the Superconducting and Structural Properties of MgB2." To appear in Studies of High Temperature Superconductors, Vol. 38, edited by A. Narlikar (Nova Science Publishers, N.Y., 2001). E-mail schill@wuphys.wustl.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110268.

S. R. Shinde, S. B. Ogale, A. Biswas, R. L. Greene, and T. Venkatesan, "Observation of large anisotropy in c-axis oriented thin films of MgB_{2} prepared by an in situ pulsed laser deposition process." Submitted to Phys. Rev B. E-mail shinde@squid.umd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110541.

Y. Z. Zhang, R. Deltour, H. H. Wen, J. F. de Marneffe, H. Chen, S. F. Wang, S. Y. Dai, Y. L. Zhou, Q. Li, A. G. M. Jansen, P. Wyder, and Z. X. Zhao, "Quantum fluctuations in a c-axis oriented MgB_{2} superconducting thin film." E-mail usersc8@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110312.

Y. G. Zhao, X. P. Zhang, P. T. Qiao, H. T. Zhang, S. L. Jia, B. S. Cao, M. H. Zhu, Z. H. Han, X. L. Wang, and B. L. Gu, "Influence of the starting composition Mg1-xB2 on the structural and superconducting properties of the MgB2 phase." To be published in Physica C (in press). Department of Physics, Tsinghua University, Beijing 100084, China; tel. 86 10 6 277 2764; fax 86 10 6 278 1604; e-mail ygzhao@tsinghua.edu.cn. 74.70.Ad; 74.62.Dh; 74.25.Ha.

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November 2001 Preprints

A. Andreone, G. Ausanio, E. Di Gennaro, G. Lamura, M. Salluzzo, J. Le Cochec, A. Gauzzi, C. Cantoni, M. Paranthaman, G. Giunchi, and S. Ceresara, "Electrodynamic response of MgB2 sintered pellets and thin films." To appear as a chapter in 'Studies of High Temperature Superconductors,' Vol. 41, A. V. Narlikar ed., Nova Sci. Publ., New York (submitted October 5, 2001). E-mail andreone@na.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110640.

Egor Babaev, "Vortices carrying an arbitrary fraction of magnetic flux quantum in two-gap superconductors." E-mail egor@nordita.dk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111192.

Sergey V. Barabash and David Stroud, "Theoretical Study of Superstructures in Mg_{1-x}Al_{x}B_2." E-mail barabash@mps.ohio-state.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111392.

A. Brinkman, A. A. Golubov, H. Rogalla, O. V. Dolgov, and J. Kortus, "Multiband model for tunneling in MgB2 junctions." E-mail a.brinkman@tn.utwente.nl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111115.

Hyoung Joon Choi, David Roundy, Hong Sun, Marvin L. Cohen, and Steven G. Louie, "First-Principles Calculation of the Superconducting Transition in MgB2 within the Anisotropic Eliashberg Formalism." E-mail hjchoi@civet.berkeley.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111182.

Hyoung Joon Choi, David Roundy, Hong Sun, Marvin L. Cohen, and Steven G. Louie, "Superconducting energy gaps, low temperature specific heat, and quasiparticle spectra of MgB2." E-mail hjchoi@civet.berkeley.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111183.

Ali Gencer, "Harmonic susceptibilities of a bulk superconductor MgB2 at low magnetic fields." Submitted to Superconductor Science and Technology in September 2001. Ankara University, Faculty of Sciences, Physics Department, 06100-Tandogan, Ankara, Turkey; e-mail gencer@science.ankara.edu.tr. Key words: superconductivity, magnesium diboride, harmonic susceptibilities and flux dynamics. 74.70.

Ali. Gencer, "Nonlinear harmonic susceptibilities of a bulk superconductor MgB2 at low magnetic fields." Submitted to Supercond. Sci. and Technol. in September 2001. Ankara University, Faculty of Sciences, Physics Department, 06100-Tandogan, Ankara,Turkey; e-mail gencer@science.ankara.edu.tr Key words: superconductivity, magnesium diboride, harmonic susceptibilities and flux dynamics. 74.70.

A. A. Golubov, J. Kortus, O. V. Dolgov, O. Jepsen, Y. Kong, O. K. Andersen, B. J. Gibson, K. Ahn, and R. K. Kremer, "Specific heat of MgB2 in a one- and a two-band model from first-principles calculations." J. Kortus' e-mail j.kortus@fkf.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111262.

A. Gumbel, J. Eckert, G. Fuchs, K. Nenkov, K.-H. Muller, and L. Schultz, "Improved superconducting properties in nanocrystalline bulk MgB2." G. Fuchs' e-mail g.fuchs@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111585.

M. A. Hein, M. Getta, S. Kreiskott, B. Moenter, H. Piel, D. E. Oates, P. J. Hirst, R. G. Humphreys, H. N. Lee, and S. H. Moon, "Recent developments in the characterization of superconducting films by microwaves." Invited contribution to EUCAS2001, accepted for publication in Physica C in its present form, Report-no: B3-01. E-mail mhein@venus.physik.uni-wuppertal.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111400.

Motoharu Imai, Kenji Nishida, Takashi Kimura, and Hideki Abe, "Superconductivity of ternary silicides A(Gax,Si1-x)2 (A = Ca, Sr, and Ba)." To be published in Physica C (in press). National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibraki 305-0047, Japan; tel. 81 298 59 2814; fax 81 298 59 2801; e-mail imai.motoharu@nims.go.jp. Key words: superconductivity, silicide, AlB2-type structure, Ca(Ga,Si)2, Ba(Ga,Si)2. 74.10.+v; 61.66.Fn; 74.70.Ad.

M. Mali, J. Roos, A. Shengelaya, H. Keller, and K. Conder, "^25Mg NMR study of the MgB_2 superconductor." J Roos' e-mail jroos@physik.unizh.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111022.

Noriyuki Nakai, Masanori Ichioka, and Kazushige Machida, "Field Dependence of Electronic Specific Heat in Two-Band Superconductors." To be published in J. Phys. Soc. Jpn. E-mail nakai@mp.okayama-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111088.

M. Pissas, G. Papavassiliou, M. Karayanni, M. Fardis, I. Maurin, I. Margiolaki, K. Prassides, and C. Christides, "A magnetization and ^{11}B NMR study of Mg_{1-x}Al_xB_2 superconductors." E-mail pissas@ath.forthnet.gr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111351.

F. S. Razavi, S. K. Bose, and H. Ploczek, "Effect of pressure on the superconductivity of MgB2." To be published in Physica C (in press). Department of Physics, Brock University, St. Catharines, Ont., Canada L2S 3A1; tel. 905 688 5550; fax 905 682 9020; e-mail saar@newton.physics.brocku.ca.

H. Rosner, A. Kitaigorodsky, and W. E. Pickett, "Prediction of High Tc Superconductivity in Hole-doped LiBC." W. E. Pickett's e-mail pickett@solid.ucdavis.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111592.

A. Serquis, Y. T. Zhu, E. J. Peterson, J. Y. Coulter, D. E. Peterson, and F. M. Mueller, "Effect of lattice strain and defects on the superconductivity of MgB2." To be published in APL. E-mail aserquis@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110598.

V. D. P. Servedio, S.-L. Drechsler, and T. Mishonov, "Surface states and their possible role in the superconductivity of MgB2." S.-L. Drechsler's e-mail s.l.drechsler@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111395. 74.25.Jb, 74.70, 74.60.Ec, 73.-r.

A. V. Sologubenko, J. Jun, S. M. Kazakov, J. Karpinski, and H. R. Ott, "Thermal and electrical transport in single crystalline MgB2." E-mail sologubenko@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111273.

H. Uchiyama, K. M. Shen, S. Lee, A. Damascelli, D. H. Lu, D. L. Feng, Z.-X. Shen, and S.Tajima, "Electronic structure of MgB2 from angle-resolved photoemission spectroscopy." Submitted to Phys. Rev. Lett. E-mail uchiyama@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111152.

K. Ueda, H. Yamamoto, and M. Naito, "Synthesis and photoemission study of as-grown superconducting MgB2 thin films." ISS 2001 proceeding. To be published in Physica C. E-mail kueda@will.brl.ntt.co.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111404.

G. M. Zhao, "Unconventional phonon-mediated superconductivity in MgB2." E-mail gmzhao@uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111260.

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December 2001 Preprints

M. Angst, R. Puzniak, A. Wisniewski, J. Jun, S. M. Kazakov, J. Karpinski, J. Roos, and H. Keller, “Evidence for a Temperature and Field Dependence of the Anisotropy of MgB2." E-mail angst@phys.ethz.ch">angst@phys.ethz.ch; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0112166.

M. Angst, R. Puzniak, A. Wisniewski, J. Jun, S. M. Kazakov, J. Karpinski, J. Roos, and H. Keller, “Non-universality of Ginzburg-Landau Anisotropy of MgB2." E-mail angst@phys.ethz.ch">angst@phys.ethz.ch; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0112171.

E. Babic, Dj. Miljanic, K. Zadro, I. Kusevic, Z. Marohnic, Dj. Drobac, X. L. Wang, and S. X. Dou, “Enhancement of Flux Pinning in Neutron Irradiated MgB2 Superconductor." FIZIKA A 10 (2001) 87. I. Kusevic's e-mail ikusevic@phy.hrt>">ikusevic@phy.hr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112170.

M. Baziljevich, A. V. Bobyl, D. V. Shantsev, T. H. Johansen, and S. I. Lee, “Origin of dendritic flux patterns in MgB2 films." To be published in Physica C (in press). Contact T. H. Johansen, Department of Physics, University of Oslo, P.O. Box 1048, Blindern, N-0316 Oslo, Norway; e-mail t.h.johansen@fys.uio.no">t.h.johansen@fys.uio.no.

Lilia Boeri, Giovanni B. Bachelet, Emmanuele Cappelluti, and Luciano Pietronero, “Small Fermi energy and phonon anharmonicity in MgB2 and related compounds." Giovanni B. Bachelet's e-mail giovanni.bachelet@roma1.infn.it">giovanni.bachelet@roma1.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112075.

D. Botta, A. Chiodoni, R. Gerbaldo, G. Giunchi, G. Ghigo, L. Gozzelino, F. Laviano, B. Minetti, and E. Mezzetti, “Temperature, field and current dependence of the flux creep activitation energy in bulk MgB2." To be published in Physica C (in press). Contact E. Mezzetti, Department of Physics, INFN-Sez. Torino, Politecnico di Torino, c.so Duca degli Abruzzi 24, 10129 Torino, Italy; 39 11 564 7314/7349; fax 39 11 564 7399; e-mail mezzetti@polito.it">mezzetti@polito.it. Key words: flux creep activation energy, flux pinning, flux-line lattice dynamics, magnesium diboride.

Y. M. Cho, “Topological Superconductor and Quantization of Supercurrent." E-mail ymcho@yongmin.snu.ac.kr">ymcho@yongmin.snu.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112498.

M. Eisterer, M. Zehetmayer, S. Toenies, H. W. Weber, M. Kambara, N. Hari Babu, D. A. Cardwell, and L.R. Greenwood, “Neutron Irradiation of MgB2 Bulk Superconductors." To be published in Superconductor Science and Technology. E-mail eisterer@ati.ac.at">eisterer@ati.ac.at; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112121.

V. V. Flambaum, G. A. Stewart, G. J. Russell, J. Horvat, and S. X. Dou, “Superconducting transition temperature of MgB2 H0.03 is higher than that of MgB2." E-mail flambaum@phys.unsw.edu.au">flambaum@phys.unsw.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112301.

A. M. Gabovich, A. I. Voitenko, Mai Suan Li, H. Szymczak, and M. Pekala, “Heat capacity of mesoscopically disordered superconductors: implications to MgB2." Submitted to Phys. Rev. Lett. Mai Suan Li's e-mail masli@ifpan.edu.pl">masli@ifpan.edu.pl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112100.

B. B. Jin, N. Klein, W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, and Sung-Ik Lee, “Energy gap, penetration depth and surface resistance of MgB2 thin films determined by microwave resonator mesurements." Submitted to PRL. E-mail b.b.jin@fz-juelich.de">b.b.jin@fz-juelich.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112350.

Zhuang-Zhi Li, Yi Xuan, Hong-Jie Tao, Peng-Shun Luo, Zhi-An Ren, Guang-Can Che, Bai-Ru Zhao, and Zhong-Xian Zhao, “Josephson tunneling in MgB2 break junctions." To be published in Physica C (in press). Contact Hong-Jie Tao, National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; fax 86 10 8264 9531; e-mail hjtao@aphy.iphy.ac.cn">hjtao@aphy.iphy.ac.cn. Key words: Josephson effects, MgB2, break junction. 74.50.+r; 74.80.Fp; 74.70.-b.

R. L. Meng, B. Lorenz, Y. Y. Xue, D. Pham, J. Cmaidalka, J. K. Meen, Y. Y. Sun, and C. W. Chu, “Synthesis and Performance of MgB2.” Preprint #01:073; submitted to MRS Fall Proceedings, Boston, MA, Nov. 27-29 (2001). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002; phone (713) 743-8200; fax (713) 743-8201; e-mail preprint@uh.edu">preprint@uh.edu.

Yu. G. Naidyuk, I. K. Yanson, L. V. Tyutrina, N. L. Bobrov, P. N. Chubov, W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, and Sung-Ik Lee, “Superconducting energy gap distribution in c-axis oriented MgB2 thin film from point contact study." Sent to CMD19 Conference of EPS (Brighton, April 2002). E-mail NAIDYUK@ilt.kharkov.ua">NAIDYUK@ilt.kharkov.ua; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112452.

Jin Nakamura, Masamitsu Watanabe, Tamio Oguchi, Sin-ya Nasubida, Eiki Kabasawa, Nobuyoshi Yamada, Kazuhiko Kuroki, Hisashi Yamazaki, Shik Shin, Yuji Umeda, Shin Minakawa, Noriaki Kimura, and Haruyoshi Aoki, “Electronic Structure of B-2p State in AlB2 Single Crystal: Direct Observation ofp\sigma and p\pi Density of States." To be published in J. Phys. Soc. Jpn. E-mail jin@pc.uec.ac.jp">jin@pc.uec.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112409.

H. Schmidt, J. F. Zasadzinski, K. E. Gray, and D. G. Hinks, “Evidence for Two-Band Superconductivity from SIS Tunneling on MgB2." E-mail hschmidt@anl.gov">hschmidt@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112144.

A. V. Sologubenko, J. Jun, S. M. Kazakov, J. Karpinski, and H. R. Ott, “Temperature dependence and anisotropy of the bulk upper critical field H_c2 of MgB2." E-mail sologubenko@solid.phys.ethz.ch">sologubenko@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112191.

H. Suderow, M. Crespo, P. Martinez-Samper, J. G. Rodrigo, G. Rubio-Bollinger, S. Vieira, N. Luchier, J. P. Brison, and P. C. Canfield, “Scanning tunneling microscopy and spectroscopy at very low temperatures." To be published in Physica C (in press). Laboratorio de Bajas Temperaturas, Departamento de Fisica de la Materia Condensada, Instituto de Ciencia de Materiales Nicolas Cabrera, Universidad Autonoma de Madrid, E-28049 Madrid, Spain; tel. 34 1 3974756; fax 34 1 3973961; e-mail hermann.suderow@uam.es">hermann.suderow@uam.es. Key words: superconductivity, scanning tunneling microscopy and spectroscopy.

E. A. Yelland, J. R. Cooper, A. Carrington, N. E. Hussey, P. J. Meeson, S. Lee, A. Yamamoto, and S. Tajima, “de Haas-van Alphen effect in single crystal MgB2." Submitted to Phys. Rev. Lett. A. Carrington's e-mail a.carrington@bris.ac.uk">a.carrington@bris.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112392.

H. W. Zandbergen, M. Y. Wu, H. Jiang, M. A. Hayward, M. K. Haas, and R. J. Cava, “The complex superstructure in Mg1-xAlxB2 at x {approx} 0.5." To be published in Physica C (in press). Laboratory of Materials Science, National Centre for HREM, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands; tel. 31 15 278 2266; fax 31 15 278 6730; e-mail h.w.zandbergen@tnw.tudelft.nl">h.w.zandbergen@tnw.tudelft.nl.

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January 2002 Preprints

D.F. Agterberg, Eugene Demler, and B. Janko, “Novel Josephson effects between multi-gap and single-gap superconductors.” E-mail agterber@uwm.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201376.

N. Askerzade, A. Gencer, N. Guclu, and A. Ky’ly’c, “On the Ginzburg-Landau Analysis of the Lower Critical Field Hc1 in MgB2.” N. Guclu’s e-mail Nusret.Guclu@science.ankara.edu.tr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201112.

Egor Babaev, “Phase diagram of a planar two-band superconductor: Condensation of vortices with fractional flux quantum and existence of a non-superconducting superfluid state in this system.” E-mail egor@teorfys.uu.se; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201547.

Egor Babaev, “Remarks on massless neutral boson, fractionalization of flux quantum and simplest vortices in two-gap superconductors.” E-mail egor@teorfys.uu.se; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201488.

Egor Babaev, Ludvig D. Faddeev, and Antti J. Niemi, “Hidden symmetry and knot solitons in a charged two-condensate Bose system.” To appear in Phys. Rev. B. E-mail egor@teorfys.uu.se; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0106152.

S. H. Baek, B. J. Suh, E. Pavarini, F. Borsa, R. G. Barnes, S. L. Budko, and P. C. Canfield, “NMR in the normal and in the superconducting state of MgB2 and comparison with AlB2.” E-mail baek@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201450.

A. V. Bobyl, D. V. Shantsev, T. H. Johansen, W. N. Kang, H. J. Kim, E. M. Choi, and S. I. Lee, “Current-induced dendritic magnetic instability in superconducting MgB2 films.” Submitted to Appl. Phys. Lett. D. V. Shantsev’s e-mail daniel.shantsev@fys.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201260.

Sergey L. Bud'ko and Paul C. Canfield, “Temperature-dependent H{c2} anisotropy in MgB2 as inferred from measurements on polycrystals.” E-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201085.

A. I. D'yachenko, V. Yu. Tarenkov, A. V. Abal'oshev, and S. J. Lewandowski, “Evidence of strong electron-phonon interaction in superconducting MgB2 from electron tunneling.” Submitted to PRL. A. V. Abal'oshev’s e-mail abala@ifpan.edu.pl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201200.

S. Elgazzar, P. M. Oppeneer, S.-L. Drechsler, R. Hayn, and H. Rosner, “Theoretical de Haas-van Alphen Data and Plasma Frequencies of MgB2 and TaB2.” To be published in Solid State Comm. v. 121, 99 (2002); AIP Conference Proc. "Correlated Electron Systems and High-Tc Superconductors" (October 2001, Salerno, Italy). S.-L. Drechsler’s e-mail s.l.drechsler@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201230.

Yu. Eltsev, S. Lee, K. Nakao, N. Chikumoto, S. Tajima, N. Koshizuka, and M. Murakami, “Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements.” To be published in PRB/Rapid Comm. E-mail yuri@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201451.

Hisatomo Harima, “Energy bandstructures of MgB2 and the related compounds.” Accepted for publication in Physica C (the ISS2001 Proceedings). E-mail harima@sanken.osaka-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201452.

J. Horvat, X. L. Wang, S. Soltanian, and S. X. Dou, “Paramagnetic Meissner effect in MgB2 superconductor.” E-mail jhorvat@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201006.

P. Jiji Thomas Joseph and Prabhakar P. Singh, “Effects of Disorder in Mg{1-x}Ta{x}B2 Alloys using Coherent-Potential Approximation.” Submitted to Solid State Communications. Prabhakar P. Singh’s e-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201094. Key words: superconductivity, alloys, transition temperature,coherent-potential approximation. 74.25.Jb; 74.70.Ad.

Kijoon H. P. Kim, W. N. Kang, Mun-Seog Kim, C. U. Jung, Hyeong-Jin Kim, Eun-Mi Choi, Min-Seok Park, and Sung-Ik Lee, “Negligible effect of grain boundaries on the supercurrent density in polycrystalline MgB2.” To be published in Physica C (in press). Contact Sung-Ik Lee, Department of Physics, National Creative Research Initiative Center for Superconductivity, Pohang University of Science and Technology, Pohang, Kyungbuk 790784, Republic of Korea; tel. 82-54-279-2073; fax 82 54 279 5299; e-mail silee@postech.ac.kr. Key words: MgB2, critical current density, vortex glass. 74.70.Ad; 74.60.Ge; 74.25.Fy; 74.25.Bt.

Mun-Seog Kim, John A. Skinta, Thomas R. Lemberger, W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, and Sung-Ik Lee, “Reflection of two-gap nature in penetration depth measurements of MgB2 film.” E-mail mskimosu@mps.ohio-state.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201550.

H. Kotegawa, K. Ishida, Y. Kitaoka, T. Muranaka, N. Nakagawa, H. Takagiwa, and J. Akimitsu, “Evidence for High-frequency Phonon Mediated S-wave Superconductivity: 11B-NMR Study of Al-doped MgB2.” E-mail kotegawa@nmr.mp.es.osaka-u.ac.jp; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0201578.

Markus Kühberger and Gerhard Gritzner, “Effects of Sn, Co and Fe on MgB2.” To be published in Physica C (in press). Contact Gerhard Gritzner, Institut fur Chemische Technologie Anorganischer Stoffe, Johannes Kepler Universitat, A 4040 Linz, Austria; tel. 43 732 2468 8703; fax 43 732 2468 8905; e-mail: gerhard.gritzner@jku.at. Key words: MgB2, Sn-doping, Co-doping, Fe-doping.

I. I. Mazin and Jens Kortus, “Interpretation of the de Haas - van Alphen experiments in MgB2.” E-mail mazin@dave.nrl.navy.mil; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201247.

R. J. Olsson, W. K. Kwok, G. Karapetrov, M. Iavarone, H. Claus, C. Peterson, G. W. Crabtree, W. N. Kang, H. J. Kim, E. M. Choi, and Sung-Ik Lee, “Effect of High Energy Heavy Ion Irradiation on c-axis Oriented MgB2 Films.” G. Karapetrov’s e-mail goran@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201022.

Z. X. Shi, M. Tokunaga, A. K. Pradhan, T. Tamegai, Y. Takano, K. Togano, H. Kito, and H. Ihara, “Lower critical field of MgB2 measured by Hall probe.” To be published in Physica C (in press). Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; tel. 81 3 5841 6863; fax 81 3 5841 6848; e-mail shi@ap6.t.u-tokyo.ac.jp. Key words: MgB2 superconductor, lower critical field Hc1. 74.60.Ec; 74.25.Ha; 74.70.Ad.

A. S. Sidorenko, L. R. Tagirov, A. N. Rossolenko, V. V. Ryazanov, and R. Tidecks, “Evidence for two-dimensional nucleation of superconductivity in MgB2.” Submitted to EuroPhys. Lett., December 3, 2001. E-mail anatoli.sidorenko@physik.uni-augsburg.de; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0201439.

Prabhakar P. Singh, “Anisotropic, Fermi-Surface-Induced Variation in Tc in MgB2 Alloys.” Submitted to Phys. Rev. Lett. E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201093. Key words: superconductivity, MgB2, alloys, superconducting transition temperature. 74.25.Jb; 74.70.Ad.

Prabhakar P. Singh, “Hole-doped, High-Temperature Superconductors Li{x}BC, Na{x}BC and C{x} : A Coherent-Potential-Based Prediction.” E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201126. Key words: superconductivity, alloys, hole-doping, transition temperature. 74.25.Jb; 74.70.Ad.

A. V. Sologubenko, J. Jun, S. M. Kazakov, J. Karpinski, and H. R. Ott, “Anomalous thermal conductivity in the mixed state of single crystalline MgB2.” E-mail sologubenko@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201517.

S. Soltanian, X. L. Wang, J. Horvat, A. H. Li, H. K. Liu, and S. X. Dou, “Improvement of critical current density in the Cu/MgB2 and Ag/MgB2 superconducting wires using the fast formation method.” Submitted to Supercond. Sci. & Technol. X. L. Wang’s e-mail xiaolin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201261. Key words: magnesium diboride, rapid fabrication, superconducting wire, critical current. 74.70.Ad.

Viktor V. Struzhkin, Yuri A. Timofeev, Eugene Gregoryanz, Russell J. Hemley, and Ho-kwang Mao, “New Methods for Investigating Superconductivity at Very High Pressures.” Proceedings of the International School of Physics ‘Enrico Fermi’, Volume CXLVII, ‘High-Pressure Phenomena’, edited by R. J. Hemley, M. Bernasconi, L. Ulivi and G. Chiarotti, in press. E-mail struzhkin@gl.ciw.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201520.

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February 2002 Preprints

J. S. Ahn, E. S. Choi, W. Kang, D. J. Singh, and E. J. Choi, “Thermoelectric power of MgB{2-x}Bex.” E-mail jsahn@physics.rutgers.edu ; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202457.

J. S. Ahn, Y.-J. Kim, M.-S. Kim, S.-I. Lee, and E. J. Choi, “Structural and superconducting properties of MgB{2-x}Bex.” To be published in Phys. Rev. B. E-mail jsahn@physics.rutgers.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202415.

Sergey V. Barabash and David Stroud, “Structural and Superconducting Transitions in Mg{1-x}Al{x}B2.” E-mail barabash@mps.ohio-state.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0111392.

Sergey V. Barabash and David Stroud, “Transition Spectra for a BCS Superconductor with Multiple Gaps: Model Calculations for MgB2.” E-mail barabash@mps.ohio-state.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202468.

J. J. Betouras, V. A. Ivanov, and F. M. Peeters, “Ginzburg - Landau theory and effects of pressure on the superconducting state of MgB2.” Submitted to Phys. Rev. Department of Physics, University of Antwerp; e-mail betouras@uia.ua.ac.be. Key words: Ginzburg-Landau, MgB2, pressure. 74.25.Jb, 74.25.Kc, 74.70.Ad.

A. Bharathi, S. Jemima Balaselvi, S. Kalavathi, G. L. N. Reddy, V. Sankara Sastry, Y. Hariharan, and T. S. Radhakrishnan, “Carbon solubility and superconductivity in MgB2.” E-mail bharathi@igcar.ernet.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202031.

O. de la Pena, A. Aguayo, and R. de Coss, “Effects of Al doping on the structural and electronic properties of Mg(1-x)Al(x)B2.” R. de Coss’ e-mail decoss@kin.mda.cinvestav.mx; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203003.

Yu. Eltsev, S. Lee, K. Nakao, N. Chikumoto, S. Tajima, N. Koshizuka, and M. Murakami, “Anisotropic Superconducting Properties of MgB2 Single Crystals.” Submitted to Physica C (in press). E-mail yuri@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202133.

W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, Heon Jung Kim, Kijoon H. P. Kim, and Sung-Ik Lee, “Universal scaling of the Hall resistivity in MgB2 superconductors.” E-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202502.

Fa-Min Liu, C. Dong, J. Q. Li, and T. M. Wang, “X-ray photoemission study of polycrystalline Mg(1-x)Al(x)B(2).” Report-no: csc02-2002-3. E-mail fmliu@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202007.

S. E. Lofland, S. D. Tyagi, K. V. Ramanujachary, and M. Botsford, “High-frequency properties of superconductors: a comparison between MgB2 and high-temperature superconductors.” To be published in Physica C (in press). Department of Physics, Center for Materials Research and Education, Rowan University, University of Maryland, College Park, MD 20742-4111; tel. 856 256 4500; fax 856 256 4478; e-mail lofland@rowan.edu.

H. Martinho, C. Rettori, P. G. Pagliuso, N. O. Moreno, and J. L. Sarrao, “Role of the E2g phonon in the superconductivity of MgB2: a Raman scattering study.” E-mail hercules@ifi.unicamp.br; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0105204.

Y. Matsumotoa, Y. Terasakia, T. Abirua, T. Akunec, and N. Sakamoto, “Characteristics of Magnetization of MgB2 Measured on Powdered Specimens with Several Sizes of Diameter.” Accepted for publication in Physica C. Advanced Materials Institute, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan; tel. 81-92-871-6631; fax 81-92-871-7667; e-mail matumoto@fukuoka-u.ac.jp. Key words: MgB2, Magnetization, London penetration depth; critical current density. 74.25.Ha 74.60Jg 74.80Bj.

T. Ord and N. Kristoffel, “Modeling MgB2 two-gap superconductivity.” To be published in Physica C (in press). Contact N. Kristoffel, Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia; tel. 372 7 428 164; fax 372 7 383 033; e-mail kolja@fi.tartu.ee. Key words: MgB2, two band, superconductivity. 74.20Mn; 74.-72.-h.

I. R. Shein, S. V. Okatov, N. I. Medvedeva, and A. L. Ivanovskii, “Electronic band structure of low-temperature YB12, YB6 superconductors and layered YB2, MgB2 diborides.” E-mail shein@ihim.uran.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202015.

Prabhakar P. Singh and P. Jiji Thomas Joseph, “Theoretical Study of Magnetism and Superconductivity in 3d Transition-Metal-MgB2 Alloys.” E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202285.

K. J. Song, N. J. Lee, H. M. Jang, H. S. Ha, D. W. Ha, S. S. Oh, M. H. Sohn, R. K. Ko, c. Park, Y. K. Kwon, and K. S. Ryu, “Single-filament composite MgB2/stainless-steel ribbons by powder-in-tube process.” To be published in Physica C (in press). Korea Electrotechnology Research Institute, Changwon, Kyungnam 641-600, South Korea; kjsong@keri.re.kr. 85.25.Kx; 74.70.Ad; 74.60.Jg; 74.25.Fy; 74.25.Ha.

R. F. Wood, Bo E. Sernelius, and A. L. Chernyshev, “Acoustic Phonon Anomaly in MgB2.” A. L. Chernyshev’s e-mail sasha@quintus.ssd.ornl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0202050.

Y. Z. Zhang, R. Deltour, H. H. Wen, J. F. de Marneffe, H. Chen, S. F. Wang, S. Y. Dai, Y. L. Zhou, Q. Li, A. G. M. Jansen, P. Wyder, and Z. X. Zhao, “Irreversibility line of MgB2 superconductor.” E-mail usersc8@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0110312.

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March 2002 Preprints

M. Angst, R. Puzniak, A. Wisniewski, J. Jun, S. M. Kazakov, J. Karpinski, J. Roos, and H. Keller, “Temperature and field dependence of the anisotropy of MgB2.” Accepted for publication in PRL. E-mail angst@phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0112166.

Andrew Das Arulsamy, P. C. Ong, and M. T. Ong, “Pseudogap and Conduction Dimensionalities in High-Tc Superconductors.” E-mail scip1130@nus.edu.sg; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203164.

C. Beneduce, H. L. Suo, P. Toulemonde, N. Musolino, and R. Flukiger, “Transport critical current, anisotropy, irreversibility fields and exponential n factors in Fe sheathed MgB2 tapes.” H. L. Suo’s e-mail hongli.suo@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203551.

S. D. Bu, D. M. Kim, J. H. Choi, J. Giencke, S. Patnaik, L. Cooley, E. E. Hellstrom, D. C. Larbalestier, C. B. Eom, J. Lettieri, D. G. Schlom, W. Tian, and X. Pan, “Synthesis and Properties of c-axis Oriented Epitaxial MgB2 Thin Films.” C. B. Eom’s e-mail eom@engr.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204004.

G. Burnell, D.-J. Kang, D. A. Ansell, H.-N. Lee, S.-H. Moon, E. J. Tarte, and M. G. Blamire, “A Directly Coupled Superconducting Quantum Interference Device Magnetometer Fabricated in Magnesium Diboride by Focused Ion Beam.” E-mail gb119@cus.cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203532.

D. A. Cardwell, N. Hari Babu, M. Kambara, and A. M. Campbell, “Magnetic properties and critical currents of bulk MgB2 polycrystalline superconductor.” To be published in Physica C (in press). IRC in Superconductivity, West Cambridge Site, University of Cambridge, Madingley Road, Cambridge CB3 0HE, UK; tel. 44 1223 337050; fax 44 1223 337074; e-mail dc135@cam.ac.uk. Key words: MgB2, critical currents, pinning force, critical fields. 74.60.Jg; 74.60.Ge; 74.60.Ec.

X. J. Chen, H. Zhang, and H.-U. Habermeier, “Effects of pressure on the superconducting properties of magnesium diboride.” Accepted for publication in Phys. Rev. B. E-mail xjchen@physics.kent.edu; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0203195.

C. Ferdeghini, V. Braccini, M. R. Cimberle, D. Marre, P. Manfrinetti, V. Ferrando, M. Putti, and A. Palenzona, “Angular dependence of magnetoresistivity in c-oriented MgB2 thin film.” Submitted to Phys. Rev. B. V. Ferrando’s e-mail ferrandov@ge.infm.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203246.

M. Iavarone, G. Karapetrov, A. E. Koshelev, W. K. Kwok, G. W. Crabtree, and D. G. Hinks, “Two-Band Superconductivity in MgB2.” G. Karapetrov’s e-mail goran@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203329.

T. V. Ignatova, G. A. Zvyagina, I. G. Kolobov, E. A. Masalitin, V. D. Fil', Yu. V. Paderno, A. N. Bykov, V. N. Paderno, and V. I. Lyashenko, “MgB2: synthesis, sound velocity, and dynamics of the vortex phase.” Low Temp. Rhys., 2002, v. 28, N3. Preprint available at http://xxx.lanl.gov/abs/cond-mat/0203126.

C. U. Jung, J. Y. Kim, P. Chowdhury, Kijoon H. P. Kim, Sung-Ik Lee, D. S. Koh, N. Tamura, W. A. Caldwell, and J. R. Patel, “Microstructure and pinning properties of hexagonal-disc shaped single crystalline MgB2.” Submitted to Phys. Rev. B. E-mail cu-jung@aist.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203123.

R. F. Klie, J. C. Idrobo, N. D. Browning, A. C. Serquis, Y. T. Zhu, X. Z. Liao, and F. M. Mueller, “Observation of coherent oxide precipitates in polycrystalline MgB2.” Submitted to Applied Physics Letters. J. C. Idrobo’s e-mail jidrob1@uic.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203292.

K. Komori, K. Kawagishi, Y. Takano, H. Fujii, S. Arisawa, H. Kumakura, M. Fukutomi, and K. Togano, “A New Approach for the Fabrication of MgB2 Superconducting Tape with Large In-field Transport Critical Current Density.” Y. Takano’s e-mail takano.yoshihiko@nims.go.jp; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0203113.

E. Z. Kurmaev, I. I. Lyakhovskaya, J. Kortus, A. Moewes, N. Miyata, M. Demeter, M. Neumann, M. Yanagihara, M. Watanabe, T. Muranaka, and J. Akimitsu, “Electronic structure of MgB2: X-ray emission and absorption studies.” Phys. Rev. B 65, 134509 (2002). J. Kortus’ e-mail kortus@theo.physik.tu-freiberg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0103487.

S. Margadonna, K. Prassides, I. Arvanitidis, M. Pissas, G. Papavassiliou, and A. N. Fitch, “Crystal structure of the Mg{1-x}AlxB2 superconductors near x=0.5.” E-mail sm413@hermes.cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204015.

E. Martinez, L. A. Angurel, R. Navarro, “Study of Ag and Cu / MgB2 powder-in-tube composite wires fabricated by in-situ reaction at low temperature.” Submitted to Supercond. Sci. Technol. E-mail elenamar@posta.unizar.es; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203464.

Dragana Mijatovic, Alexander Brinkman, Guus Rijnders, Hans Hilgenkamp, Horst Rogalla, and Dave H. A. Blank, “Superconducting thin films of MgB2 by pulsed-laser deposition.” To be published in Physica C (in press). Department of Applied Physics, Low Temperature Division, MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; fax 31 53 489 1099; e-mail d.mijatovic@tn.utwente.nl. Key words: MgB2, thin films, pulsed-laser deposition.

H. Rosner, J.M. An, W.E. Pickett, and S.-L. Drechsler, “Fermi Surfaces of Diborides: MgB2 and ZrB2.” S.-L. Drechsler’s e-mail s.l.drechsler@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203030.

Young-Woo Son, Jaejun Yu, and Jisoon Ihm, “Dynamic Jahn-Teller Mechanism of Superconductivity in MgB2.” E-mail hand@phya.snu.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203204.

H.L. Suo, C. Beneduce, X.D. Su, and R. Flukiger, “Fabrication and transport critical currents of multifilamentary MgB2/Fe wires and tapes.” E-mail hongli.suo@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203114.

K. Ueda and M. Naito, “Growth of superconducting MgB2 thin films.” E-mail kueda@will.brl.ntt.co.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203181.

R. R. Urbano, P. G. Pagliuso, C. Rettori, Y. Kopelevich, N. O. Moreno, and J. L. Sarrao, “Field distribution and flux-line depinning in the mixed-state of MgB2 probed by Conduction Electron Spin Resonance.” E-mail urbano@ifi.unicamp.br; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203443.

R. Vaglio, M. G. Maglione, and R. Di Capua, “High quality MgB2 thin films in-situ grown by dc magnetron sputtering.” R. Di Capua’s e-mail roberto.dicapua@na.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0203322.

U. Welp, G. Karapetrov, W. K. Kwok, G. W. Crabtree, Ch. Marcenat, L. Paulius, T. Klein, J. Marcus, K. H. P. Kim, C. U. Jung, H.-S. Lee, B. Kang, and S.-I. Lee, “Superconducting Transition and Phase Diagram of Single Crystal MgB2.” G. Karapetrov’s e-mail goran@anl.gov; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0203337.

Ya-Bin Zhu, Jia-Di Xu, Shu-Fang Wang, Yue-Liang Zhou, Zheng-Hao Chen, Hui-Bin Lu, Meng He, Shou-Yu Dai, Qin Zhang, and Guo-Zhen Yang, “Fabrication of MgB2 superconducting thick films by electrophoresis technique.” To be published in Physica C (in press). Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, China; tel. 86 10 8264; 9299; e-mail zyb@aphy.iphy.ac.cn. Key words: MgB2 thick films, electrophoresis technique. 74.76; 81.15; 74.80.

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April 2002 Preprints

Hideki Abe and Kenji Yoshii, “Electrochemical Synthesis of Superconductive Boride MgB2 from Molten Salts.” Submitted to Jpn. J. Appl. Phys. on 27. Dec. 2001. E-mail takano.yoshihiko@nims.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204169.

S. Amoruso, R. Bruzzese, N. Spinelli, R. Velotta, X. Wang, and C. Ferdeghini, “Optical emission investigation of laser-produced MgB2 plume expanding in an Ar buffer gas.” In press, Applied Physics Letters. Preprint available at http://xxx.lanl.gov/abs/cond-mat/0204374.

A. Andreone, A. Cassinese, C. Cantoni, E. Di Gennaro, G. Lamura, M. G. Maglione, M. Paranthaman, M. Salluzzo, and R. Vaglio, “Study of the microwave electrodynamic response of MgB2 thin films.” To be published in Physica C (in press). INFM and Dipartimento di Scienze Fisiche, Universita’ degli Studi di Napoli Federico II, Facolta’ di Ingegneria, Piazzale Tecchio 80, I-80125 Napoli, Italy; tel. 39 81 768 2547; fax 39 81 239 1821; e-mail andreone@unina.it. Key words: MgB2 superconductor, thin films, microwave surface impedance.

S. L. Bud’ko, P. C. Canfield, and V. G. Kogan, “Magnesium diboride: basic physical properties and high upper critical field anisotropy.” To be published in Physica C (in press). Ames Laboratory, Department of Physics and Astronomy, A111 Physics Hall, Iowa State University, Ames, IA 50011; tel. 515 294 3986; fax 515 294 0689; e-mail budko@ameslab.gov. Key words: magnesium diboride, synthesis, upper critical field, anisotropy. 74.70.Ad; 74.60.Ec.

Gavin Burnell, Robert H. Hadfield, Christopher Bell, Dae-Joon Kang, and Mark G. Blamire, “Nanoscale superconductor-normal metal-superconductor junctions fabricated by focused ion beam.” To be published in Physica C (in press). Device Materials Group, Department of Materials Science and IRC in Superconductivity, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK; fax 44 1223 334373; e-mail gb119@cus.cam.ac.uk. Key words: superconducting junctions, voltage standards, magnesium diboride.

Yu. Eltsev, K. Nakao, S. Lee, T. Masui, N. Chikumoto, S. Tajima, N. Koshizuka, and M. Murakami, “Anisotropic resistivity and Hall effect in MgB2 single crystals.” E-mail yuri@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204027.

W. Goldacker, S. I. Schlachter, H. Reiner, S. Zimmer, B. Obst, H. Kiesel, and A. Nyilas, “Mechanically Reinforced MgB2 Wires and Tapes with High Transport Currents.” To be published in ‘Studies of High Temperature Superconductors, Vol. 45’, edited by A. Narlikar (Nova Science Publishers, N.Y., 2002) Report-no: ITPHTS-02-Narlikar. S. I. Schlachter’s e-mail sonja.schlachter@itp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204599.

D. Hinz, A. Handstein, G. Fuchs, K.-H. Muller, K. Nenkov, O. Gutfleisch, V. N. Narozhnyi, and L. Schultz, “Observation of texture for fully dense MgB2 superconductor processed by hot deformation.” To be published in Physica C (in press). Contact A. Handstein, Institut fur Festkorper-und Werkstofforschung Dresden e.V., Postfach 270116, D-01171 Dresden, Germany; tel. 49 351 4659 526; fax 49 351 4659 537; e-mail a.handstein@ifw-dresden.de. Key words: superconductivity, MgB2, texture, upper critical field.

V. A. Ivanov, J. J. Betouras, and F. M. Peeters, “MgB2: superconductivity and pressure effects.” Invited lecture at NATO ARW on ‘Recent trends in the theory of physical phenomena in high magnetic fields’, February 2002, Les Houches. J. J. Betouras’ e-mail betouras@uia.ua.ac.be; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204085. Key words: MgB2, Ginzburg-Landau, pressure, microscopic theory. 74.20.De; 74.25.Dw; 74.62.Fj; 74.70.Ad.

Z. Ivanov, A. Malisa, L.-G. Johansson, and P. V. Komissinski, “Superconductivity in magnesium diboride thin films.” To be published in Physica C (in press). Department of Microelectronics and Nanoscience, Chalmers University of Technology, Goteborg University, SE-41296 Goteborg, Sweden; tel. 46 31 7723117; e-mail f4azi@fy.chalmers.se. Key words: magnesium diboride, thin films, in situ, superconductivity.

B. B. Jin, N. Klein, A. Pimenov, A. Loidl, S. I. Krasnosvobodtsev, S.-IK Lee, and W. N. Kang, “Microwave measurement of energy gap and penetration depth of MgB2 thin film.” To be published in Physica C (in press). ISG-2, Forschungszentrum Julich, Institute of Thin Films and Interfaces, D-52425 Julich, Germany; fax 49 2461 612470; e-mail b.b.jin@fz-juelich.de. Key words: MgB2, magnetic field penetration depth, energy gap, dielectric resonator technique.

V. G. Kogan, “Macroscopic anisotropy in superconductors with anisotropic gaps.” E-mail kogan@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204038.

H. Kumakura, A. Matsumoto, H. Fujii, H. Kitaguchi, and K. Togano, “Microstructure and superconducting properties of powder-in-tube processed MgB2 tapes.” To be published in Physica C (in press). Energy Conversion Materials Research Group, Superconductor Materials Research Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; tel. 81 298 59 2327; fax 81 298 59 2301; e-mail kumakura.hiroaki@nims.go.jp. Key words: MgB2, powder-in-tube method, critical current density. 85.25.Kx; 74.70.Ad; 74.60.Jg.

A. Malagoli, V. Braccini, N. Scati, S. Roncallo, A. S. Siri, and G. Grasso, “Fabrication and superconducting properties of powder-in-tube processed MgB2 tapes.” To be published in Physica C (in press). Contact G. Grasso, INFM, Research Unit of Genova, Via Dodecaneso 33, 16146 Genova, Italy; fax 39 10 311066; e-mail grasso@ge.infm.it. Key words: MgB2 superconductors, applications of high-Tc superconductors, critical current density.

M. B. Maple, B. J. Taylor, N. A. Frederick, S. Li, V. F. Nesterenko, S. S. Indrakanti, and M. P. Maley, “Critical scaling and flux dynamics in bulk MgB2 and high-purity YBa2Cu3O7-d single crystals.” To be published in Physica C (in press). Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093-0319; tel. 858 534 3968; fax 858 534 1241; e-mail mbmaple@ucsd.edu. Key words: MgB2, YBa2Cu3O7-d, vortex dynamics, critical scaling. 74.25.Dw; 74.25.Fy; 74.60.Ge; 75.40.Cx.

I. I. Mazin, O. K. Andersen, O. Jepsen, O. V. Dolgov, J. Kortus, A. A. Golubov, A. B. Kuz'menko, and D. van der Marel, “Two-gap superconductivity in MgB{2}: clean or dirty?” E-mail mazin@dave.nrl.navy.mil; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0204036.

R. L. Meng, B. Lorenz, Y. S. Wang, J. Cmaidalka, Y. Y. Sun, Y. Y. Xue, J. K. Meen, and C. W. Chu, “Study of binary and pseudo-binary intermetallic compounds with AlB2 structure.” To be published in Physica C (in press). Department of Physics and Texas Center for Superconductivity, University of Houston, 202 Houston Science Center, Houston, TX 77204-5002; tel. 713 743 8306; fax 713 743 8201; e-mail rmeng@uh.edu. Key words: AlB2 structure, intermetallic compounds, valence electron number, lattice parameter. 74.70.Ad; 74.62.-c; 74.62.Bf; 74.62.Dh.

E. Mezzetti, D. Botta, R. Cherubini, A. Chiodoni, R. Gerbaldo, G. Ghigo, G. Giunchi, L. Gozzelino, and B. Minetti, “Low energy proton irradiation on MgB2 bulk.” To be published in Physica C (in press). INFN Sez. Torino, Department of Physics, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy; tel. 39 11 564 7317/7349; fax 39 11 564 7399; e-mail mezzetti@polito.it. Key words: proton irradiation, magnesium diboride.

Todor M. Mishonov, Evgeni S. Penev, and Joseph O. Indekeu, “Comment on ‘Anisotropic s-wave superconductivity in MgB2’.” To be submitted to Phys. Rev. B. Evgeni S. Penev’s e-mail penev@fhi-berlin.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204545.

K.-H. Muller, G. Fuchs, A. Handstein, K. Nenkov, V. N. Narozhnyi, D. Eckert, and M. Wolf, “Investigation of upper critical fields and irreversibility line in superconducting MgB2.” To be published in Physica C (in press). Contact V. N. Narozhnyi, Institute fur Festkorper- und Werkstofforschung Dresden, Postfach 270116, D-01171 Dresden, Germany; tel. 49 351 4659 347; fax 49 351 4659 537; e-mail narozh@ifwdresden.de. Key words: superconductors, MgB2, upper critical field, irreversibility field.

H. Narayan, S. B. Samanta, A. Gupta, A. V. Narlikar, R. Kishore, K. N. Sood, D. Kanjilal, T. Muranaka, and J. Akimitsu, “SEM, STM/STS and heavy ion irradiation studies on magnesium diboride superconductor.” To be published in Physica C (in press). National Physical Laboratory, #36, Superconductivity Division, Dr. K. S. Krishnan Marg, New Delhi 110 012, India; e-mail himnar@lycos.com. Key words: magnesium diboride, scanning electron microscopy, scanning tunneling microscopy, grain boundaries, ion irradiation. 74.70.Dd; 74.80.Bj; 68.37.Ef.

S. Okayasu, M. Sasae, K. Hojou, Y. Chimi, A. Iwase, H. Ikeda, R. Yoshizaki, T. Kambara, H. Sato, Y. Hamatani, and A. Maeda, “Irradiation effects on MgB2 bulk samples and formation of columnar defects in high-Tc superconductor.” To be published in Physica C (in press). Research Group for Solid State Physics, Department of Materials Science, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan; tel. 81 29 282 5466; fax 81 29 282 6716; e-mail okayasu@popsvr.tokai.jaeri.go.jp. Key words: MgB2, Bi-2212, irradiation, pinning, columnar defects, thermal spike. 74.60.Ge; 74.60.Jg; 74.70.Ad.

G. Papavassiliou, M. Pissas, M. Karayanni, M. Fardis, S. Koutandos, and K. Prassides, “^{11}B and ^{27}Al NMR spin-lattice relaxation and Knight shift study of Mg{1-x}AlxB2. Evidence for anisotropic Fermi surface.” M. Pissas’ e-mail pissas@ath.forthnet.gr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204238.

Tuson Park, M. B. Salamon, C. U. Jung, Min-Seok Park, Kyunghee Kim, and Sung-Ik Lee, “Fluctuation Study of the Specific Heat of MgB2.” E-mail tpark2@students.uiuc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204233.

A. I. Posazhennikova, T. Dahm, and K. Maki, “Anisotropic s-wave superconductivity: comparison with experiments on MgB2 single crystals.” T. Dahm’s e-mail dahm@uni-tuebingen.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204272.

T. A. Prikhna, W. Gawalek, A. B. Surzhenko, V. E. Moshchil, N. V. Sergienko, Ya. M. Savchuk, V. S. Melnikov, P. A. Nagorny, T. Habisreuther, S. N. Dub, M. Wendt, D. Litzkendorf, J. Dellith, Ch. Schmidt, G. Krabbes, and A. V. Vlasenko, “High-pressure synthesis of MgB2 with and without tantalum additions.” To be published in Physica C (in press). Institute for Superhard Materials, 2, Avtozavodskaya Street, Kiev 04074, Ukraine; fax 380 44 468 86 25; e-mail prikhna@iptelecom.net.ua. Key words: MgB2, high-pressure synthesis, structure, superconductive and mechanical properties.

T. A. Prikhna, Ya. M. Savchuk, N. V. Sergienko, V. E. Moshchil, S. N. Dub, P. A. Nagorny, W. Gawalek, T. Habisreuther, M. Wendt, A. B. Surzhenko, D. Litzkendorf, Ch. Schmidt, J. Dellith, and V. S. Melnikov, “Synthesis and Sintering of MgB2 Under High Pressure.” A. B. Surzhenko’s e-mail surzhenko@ipht-jena.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204068.

R. A. Ribeiro, S. L. Bud’ko, C. Petrovic, and P. C. Canfield, “Effects of stoichiometry, purity, etching and distilling on resistance of MgB2 pellets and wire segments.” E-mail ribeiro@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204510.

A. V. Sologubenko, J. Jun, S. M. Kazakov, J. Karpinski, and H. R. Ott, “Thermal conductivity of single crystalline MgB2.” E-mail sologubenko@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201517.

M. D. Sumption, E. W. Collings, E. Lee, X. L. Wang, S. Soltanian, S. X. Dou, and M. Tomsic, “Real and apparent loss suppression in MgB2 superconducting composites.” To be published in Physica C (in press). LASM, Department of Materials Science and Engineering, The Ohio State University, 477 Watts Hall, 2041 College Ave., Columbus, OH 43210-1179; tel. 614 688 3684; fax 614 688 3677; e-mail mdsumption+@osu.edu. Key words: MgB2, powder in tube method, Fe sheath, magnetic ac loss, magnetic shielding. 74.72.B; 74.80.B; 75.60; 74.70; 85.25.

Kyoji Tachikawa, Yutaka Yamada, Osamu Suzuki, Masakazu Enomoto, and Makoto Aodai, “Effects of metal powder addition on the critical current in MgB2 tapes.” To be published in Physica C (in press). Faculty of Engineering, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259 1292, Japan; tel. 81 463 58 1211; fax 81 463 50 2096; e-mail tacsuper@keyaki.cc.u-tokai.ac.jp. Key words: MgB2, powder in tube method, metal powder addition, In addition, critical current density. 85.25.Kx; 74.70.Ad; 74.60.Jg.

Ken’ichi Takahashi, Toshiyuki Atsumi, Nariaki Yamamoto, Mingxiang Xu, Hideaki Kitazawa, and Takekazu Ishida, “Superconducting anisotropy and evidence for intrinsic pinning in single crystalline MgB2.” To be published in Physical Review B. Takekazu Ishida’s e-mail ishida@center.osakafu-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205010.

L. Tewordt and D. Fay, “Specific heat and thermal conductivity in the mixed state of MgB2.” D. Fay’s e-mail fay@physnet.uni-hamburg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204468.

J. Wang, Y. Bugoslavsky, A. Berenov, L. Cowey, A. D. Caplin, L. F. Cohen, J. L. MacManus Driscoll, L. D. Cooley, X. Song, and D. C. Larbalestier, “High Critical Current Density and Improved Irreversibility Field in Bulk MgB2 Made By A Scaleable, Nanoparticle Addition Route.” Y. Bugoslavsky’s e-mail y.bugoslav@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204472.

Kenji Yoshii and Hideki Abe, “Electrical transport properties of bulk MgB2 materials synthesized by the electrolysis on fused mixtures of MgCl2, NaCl, KCl and MgB2O4.” Hideki Abe’s e-mail abe.hideki@nims.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204208.

M. Zehetmayer, M. Eisterer, H. W. Weber, J. Jun, S. M. Kazakov, J. Karpinski, and A. Wisniewski, “Mixed state properties of superconducting MgB2 single crystals.” E-mail zehetm@ati.ac.at; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204199.

Y. Z. Zhang, R. Deltour, H. H. Wen, C. Q. Jin, Y. M. Ni, S. L Jia, G. C. Che, and Z. X. Zhao, “Quantum tunneling of vortices in a MgB2 superconductor.” E-mail usersc8@aphy.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0204396.

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May 2002 Preprints

M. Angst, R. Puzniak, A. Wisniewski, J. Jun, S. M. Kazakov, and J. Karpinski, “Disorder-Induced Phase Transition of Vortex Matter in MgB2.” E-mail angst@phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205293.

D. K. Aswal, Shashwati Sen, S. C. Gadkari, Ajay Singh, S. K. Gupta, L. C. Gupta, A. Bajpai, and A. K. Nigam, “Andreev Reflections on a MgB2 Superconductor.” Submitted to Phys. Rev. B. Contact S. K. Gupta, Head, Thin Film Devices Section, Technical Physics & Prototype Engineering Division, BARC, Mumbai -400085, India, tel. 91 22 5593863, fax 91 22 5505151; e-mail: drgupta@magnum.barc.ernet.in. Key words: MgB2 superconductor, Andreev Reflection, S-N Junctions. 74.70Ad, 74.50+r, 74.80Fp.

F. L. Barkov, D. V. Shantsev, T. H. Johansen, P. E. Goa, W. N. Kang, H. J. Kim, E. M. Choi, and S. I. Lee, “Local threshold field for dendritic instability in superconducting MgB2 films.” Submitted to Phys. Rev. B. D. V. Shantsev’s e-mail daniel.shantsev@fys.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205361.

V. Beilin, I. Felner, E. Yashchin, E. Dul’kin, M. Roth, I. Lapides, and A. Verdyan, “Critical current anisotropy in non-sintered metal-clad MgB2 tapes.” To be published in Physica C (in press). School of Applied Science, Crystal Physics Laboratory, The Hebrew University of Jerusalem, Bergman Bldg., 91904 Jerusalem, Israel; tel. 98 972 2 658 6414; fax 98 972 2 566 3878; e-mail beilin@cc.huji.ac.il. Key words: MgB2, tapes, critical currents, anisotropy, texture. 74.70.Ad; 74.80.Bj; 74.60.Jg; 74.25.Ld; 74.25.Ha.

Pablo de la Mora, Miguel Castro, and Gustavo Tavizon, “Comparative Study of the Electronic Structure of Alkaline-Earth Borides (MeB2; Me=Mg, Al, Zr, Nb, and Ta) and Their Normal-State Conductivity.” E-mail delamora@servidor.unam.mx; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205291.

A. A. Golubov, A. Brinkman, O. V. Dolgov, J. Kortus, and O. Jepsen, “Multiband model for penetration depth in MgB2.” Submitted to Phys. Rev. B. E-mail a.golubov@tn.utwente.nl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205154.

J. D. Jorgensen, D. G. Hinks, P. G. Radaelli, W. I. F. David, and R. M. Ibberson, “Large Anisotropic Thermal Expansion Anomaly near the Superconducting Transition Temperature in MgB2.” E-mail jjorgensen@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205486.

C. U. Jung, H.-J. Kim, M.-S. Park, M.-S. Kim, J. Y. Kim, Z. Du, S.-I. Lee, K. H. Kim, J. B. Betts, M. Jaime, A. H. Lacerda, and G. S. Boebinger, “Effects of unreacted Mg impurities on the transport properties of MgB2.” To be published in Physica C (in press). Contact S.-I. Lee, National Creative Research Initiative Center for Superconductivity and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, South Korea; fax 82 54 279 5299; e-mail silee@postech.ac.kr. Key words: MgB2, high pressure, RRR, magnesium diboride. 74.25.Fy; 74.60.-w; 74.70.Ad; 74.72.-h.

H. Kotegawa, K. Ishida, Y. Kitaoka, T. Muranaka, N. Nakagawa, H. Takagiwa, and J. Akimitsu, “Evidence for strong-coupling s-wave superconductivity in MgB2: 11 B-NMR study of MgB2 and the related materials.” To be published in Physica C (in press). Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560 8531, Japan; tel./fax 81 6 6850 6438; e-mail kotegawa@nmr.mp.es.osaka-u.ac.jp. Key words: MgB2, NMR, s-wave superconductivity, Al-doping effect. 74.62.Dh; 74.70.Ad.

S. Lee, A. Yamamoto, H. Mori, Yu. Eltsev, T. Masui, and S. Tajima, “Single crystals of MgB2 superconductor grown under high-pressure in Mg-B-N system.” To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5714/5717; e-mail lee@istec.or.jp. Key words: MgB2, single crystal growth, high-pressure, Mg-B-N system. 74.70.Ad; 81.10.h; 07.35.+k.

T. M. Mishonov, E. S. Penev, and J. O. Indekeu, “Comment on ‘Anisotropic s-wave superconductivity: comparison with experiments on MgB2’ [A. I. Posazhennikova, T. Dahm and K. Maki, cond-mat/0204272].” Submitted to Europhys. Lett. E. S. Penev’s e-mail penev@fhi-berlin.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205104.

L. E. Muzzy, M. Avdeev, G. Lawes, M. K. Haas, H. W. Zandbergen, A. P. Ramirez, J. D. Jorgensen, and R. J. Cava, “Structure and Superconductivity in Zr-Stabilized, Nonstoichiometric Molybdenum Diboride.” Submitted to Physica C. R. J. Cava’s e-mail rcava@princeton.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206006.

Seiichiro Onari, Kazuhiko Kuroki, Ryotaro Arita, and Hideo Aoki, “Superconductivity induced by inter-band nesting in the three-dimensional honeycomb lattice.” E-mail onari@cms.phys.s.u-tokyo.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0201189.

Alexey V. Pan, Sihai Zhou, Shi Xue Dou, and Hua Kun Liu, “Direct visualization of iron sheath shielding effect in MgB2 superconducting wires.” E-mail pan@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205253.

G. K. Perkins, J. Moore, Y. Bugoslavsky, L. F. Cohen, J. Jun, S. M. Kazakov, J. Karpinski, and A. D. Caplin, “Super-conducting critical fields and anisotropy of a MgB2 single crystal.” E-mail g.perkins@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205036.

A. Perucchi, L. Degiorgi, J. Jun, M. Angst, and J. Karpinski, “Magneto-optical reflectivity of superconducting MgB2 single crystals.” Submitted to PRL. L. Degiorgi’s e-mail degiorgi@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205596.

M. Pissas, S. Lee, A. Yamamoto, and S. Tajima, “Peak effect in single crystal MgB2 superconductor for {\bf H}\parallel c-axis.” Submitted for publication in PRL. E-mail pissas@ath.forthnet.gr; preprint also available at
http://xxx.lanl.gov/abs/cond-mat/0205561.

J. W. Quilty, S. Lee, A. Yamamoto, and S. Tajima, “Raman scattering measurement of the superconducting gap character in MgB2 single crystals.” To be published in Physica C (in press). Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5717; e-mail quilty@istec.or.jp. Key words: Raman spectroscopy, superconducting gap, MgB2. 74.25.Gz; 74.72.Bk; 78.20.-e; 78.30.-j.

S. Schuppler, E. Pellegrin, N. Nuecker, T. Mizokawa, M. Merz, D. A. Arena, J. Dvorak, Y. U. Idzerda, D.-J. Huang, C.-F. Cheng, K.-P. Bohnen, R. Heid, P. Schweiss, and Th. Wolf, “Electronic structure of single-crystalline Mg(x)Al(1-x)B(2).” E-mail schupp@ifp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205230.

Shashwati Sen, Ajay Singh, D. K. Aswal, S. K. Gupta, J. V. Yakhmi, V. C. Sahni, Eun-Mi Choi, Hyeong-Jin Kim, Kijoon H. P. Kim, Hyun-Sook Lee, W. N. Kang, and Sung-Ik Lee, “Anisotropy of Critical Current Density in c-axis Oriented MgB2 Thin Films.” Submitted to Physical Review B. Contact S. K. Gupta, Head, Thin Film Devices Section, Technical Physics & Prototype Engineering Division, BARC, Mumbai -400085, India; tel: 91 22 5593863; fax 91 22 5505151; e-mail drgupta@magnum.barc.ernet.in. Key words: critical current, anisotropy, Ginzburg Landau model, anisotropy parameter. 74.60.Ge; 74.76-w; 74.70.Ad.

S. G. Sharapov, V. P. Gusynin, and H. Beck, “Effective action approach to the Leggett's mode in two-band superconductors.” E-mail sergei.sharapov@unine.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205131.

S. Soltanian, J. Horvat, X. L. Wang, M. Tomsic, and S. X. Dou, “Transport critical current of Solenoidal MgB2/Cu Coils Fabricated Using a Wind-Reaction In-situ Technique.” X. L. Wang’s e-mail xiaolin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205406.

D. L. Yin, Z. Qi, H. Y. Xu, and F. R. Wang, “Resistive Transition Equation of Mixed State.” E-mail ydl@ibm320h.phy.pku.edu.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0205407.

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June 2002 Preprints

T. Akune, H. Abe, A. Koga, N. Sakamoto, and Y. Matsumoto, “AC susceptibility and magnetic relaxation in powdered MgB2 with several diameter sizes.” To be published in Physica C (in press). Department of Electrical Engineering, Kyushu Sangyo University, 2-3-1 Matsukadai, Higashi-ku, Fukuoka 813-8503, Japan; fax 81 92 673 5091; e-mail akune@te.kyusan-u.ac.jp. Key words: MgB2, magnetization, pinning potential, AC susceptibility. 74.72.

M. Angst, R. Puzniak, A. Wisniewski, J. Roos, H. Keller, and J. Karpinski, “Comment on ‘Superconducting anisotropy and evidence for intrinsic pinning in single crystalline MgB2’.” Submitted to Phys. Rev. B. E-mail angst@phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206407.

N. V. Anshukova, B. M. Bulichev, A. I. Golovashkin, L. I. Ivanova, I. B. Krinetskii, and A. P. Rusakov, “Thermal expansion anomaly of MgB2 at low temperatures and magnetic field influence.” To be published in Physica C (in press). Contact A. I. Golovashkin, P. N. Lebedev Physical Institute RAS, 119991 Moscow, Russia; tel. 7 95 135 4285; fax 7 95 938 2251; e-mail golov@sci.lebedev.ru. Key words: MgB2, high temperature superconductivity, thermal expansion, magnetic field. 74.25.Bt; 74.25.Ha; 74.25.Kc; 74.72.Yg.

Mohamed H. Badr and K.-W. Ng, “Temperature and field dependence of MgB2 energy gaps from tunneling spectra.” E-mail mhbadr0@uky.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206391.

C. H. Cheng, Y. Zhao, L. Wang, and H. Zhang, “Preparation, structure and superconductivity of Mg1-xAgxB2.” To be published in Physica C (in press). Contact Y. Zhao, Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Sydney 2052, NSW, Australia; tel. 61 2 9385 5986; fax 61 2 9385 5956; e-mail y.zhao.@unsw.edu.au. Key words: MgB2, doping effect, silver, superconductivity. 74.62.Bf; 74.62.Dh.

Noriko Chikumoto, Ayako Yamamoto, Marcin Konczykowski, and Masato Murakami, “Magnetization behavior of MgB2 and the effect of high energy heavy-ion irradiation.” To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 1-16-25 Shibaura, Minato-ku, Tokyo 105-0023, Japan; tel. 81 3 3454 9284; fax 81 3 3454 9287; e-mail chiku@istec.or.jp. Key words: MgB2, heavy-ion irradiation, magneto-optical image, critical current density. 74.60.Ge; 74.60.Jg.

S. X. Dou, A. V. Pan, S. Zhou, M. Ionescu, H. K. Liu, and P. R. Munroe, “Substitution induced pinning in MgB2 superconductor doped with SiC nano-particles.” A. V. Pan’s e-mail pan@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206444. Keywords: MgB2 superconductor, doping, intra-grain pinning. 74.60.Ge, 74.60.Jg, 74.62.Dh.

M. Fukuda, E. S. Otabe, and T. Matsushita, “Magnetic characterization of superconducting MgB2.” To be published in Physica C (in press). Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 820 8502, Japan; tel./fax 81 948 29 7683; e-mail fukuda@aquarius10.cse.kyutech.ac.jp. Key words: MgB2 superconductor, irreversibility field, flux creep-flow model. 74.20.-z, 74.60.Ge; 74.70.Ad.

T. Goto and H. Katoh, “Fabrication of MgB2 superconducting wire by suspension spinning.” To be published in Physica C (in press). Nagoya institute of Technology, Materials Science and Engineering, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; tel. 81 52 735 5265; fax 81 52 735 5294; e-mail zwgoto@mse.nitech.ac.jp. Key words: suspension spinning, filamentary, MgB2. 85.25.Kx.

G. Grasso, A. Malagoli, D. Marre, E. Bellingeri, V. Braccini, S. Roncallo, N. Scati, and A. S. Siri, “Transport properties of powder-in-tube processed MgB2 tapes.” To be published in Physica C (in press). LAMIA, INFM-Research Unit of Genova, Via Dodecaneso 33, 16146 Genova, Italy; fax 39 010 311066; e-mail grasso@ge.infm.it. Key words: MgB2 superconductors, applications of high-Tc superconductors, critical current density. 74.25.Fy; 74.60.Jg.

H. Ikeda, T. Koyano, T. Arima, K. Yoshikawa, and R. Yoshizaki, “Transport and magnetic properties of superconducting MgB2.” To be published in Physica C (in press). Institute of Materials Science and Cryogenics, University of Tsukuba, Ibaraki 305-8577, Japan; tel. 81 298 53 2484; fax 81 298 53 2482; e-mail ikeda@bk.tsukuba.ac.jp. Key words: irreversibility line, residual resistance ratio, MgB2. 74.25.Fy; 74.25.Ha; 74.60.Ge.

V. A. Ivanov, M. A. Smondyrev, and J. T. Devreese, “Pressure Effects and Large Polarons in Layered MgB2 Superconductor.” Submitted to Phys. Rev. B. M. A. Smondyrev’s e-mail micha@uia.ua.ac.be; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206300.

D.-J. Kang, N. H. Peng, R. Webb, C. Jeynes, J. H. Yun, S. H. Moon, D. Oh, G. Burnell, E. J. Tarte, D. F. Moore, and M. G. Blamire, “Josephson effects in MgB2 meta masked ion damage junctions.” Submitted to APL. E-mail djk1003@cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206207.

Y. Kimishima, M. Uehara, T. Kuramoto, Y. Ichiyanagi, Y. Iriyama, and K. Yorimasa, “Comments on magnetically estimated Jc for MgB2 by critical state models.” To be published in Physica C (in press). Faculty of Engineering, Department of Physics, Graduate School of Yokohama National University, Tokiwadai 79-5, Hodogaya, Yokohama 240-8501, Japan; tel./fax 81 45 339 4182; e-mail kimi@ynu.ac.jp. Key words: critical current density, critical state model, magnetization, MgB2. 74.20.-z; 74.25.Ha; 74.60.-w; 74.60.Jg.

P. Kus, A. Plecenik, L. Satrapinsky, Y. Xu, and R. Sobolewski, “Superconducting properties of MgB2 thin films prepared on flexible plastic substrates.” A. Plecenik’s e-mail plecenik@savba.sk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206442.

Suyoun Lee, Z. G. Khim, Yonuk Chong, S. H. Moon, H. N. Lee, H. G. Kim, B. Oh, Eun Jip Choi, “Measurement of the superconducting gap of MgB2 by point contact spectroscopy.” To be published in Physica C (in press). Superconductivity and SPM Laboratory 25-326, Seoul National University, Seoul 151-742, South Korea; tel. 82 2 874 1887; fax 82 2 874 3890; e-mail y@supercon.snu.ac.kr. Key words: point contact spectroscopy, magnesium diboride, Andreev reflection, superconductivity. 74.50.+r; 74.80.Fp; 74.76.Db.

I. Loa, K. Kunc, K. Syassen, and P. Bouvier, “Crystal structure and lattice dynamics of AlB2 under pressure and implications for MgB2.” E-mail loa@servix.mpi-stuttgart.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206051.

L. Lyard, P. Samuely, P. Szabo, C. Marcenat, T. Klein, K. H. P. Kim, C. U. Jung, H.-S. Lee, B. Kang, S. Choi, S.-I. Lee, L. Paulius, J. Marcus, S. Blanchard, A. G. M. Jansen, U. Welp, and W. K. Kwok, “Anisotropy of the Upper Critical Field and Critical Current in Single Crystal MgB2.” P. Samuely’s e-mail samuely@saske.sk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206231.

T. Masui, S. Lee, A. Yamamoto, and S. Tajima, “Transport properties of MgB2 single crystal.” To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Tokyo 135-0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5714; e-mail masui@istec.or.jp. Key words: MgB2, resistivity, anisotropy. 74.70.-b; 74.72.Yg; 74.25.Fy.

Y. Matsumoto, Y. Terasaki, T. Abiru, T. Akune, and N. Sakamoto, “Characteristics of magnetization of MgB2 measured on powdered specimens with several sizes of diameter.” To be published in Physica C (in press). Department of Electrical Engineering, Fukuoka University, 8-19-1 Nanakuma, 814-0180 Fukuoka, Japan; tel. 81 92 871 6631; fax 81 92 871 7667; e-mail matsumoto@fukuoka-u.ac.jp. Key words: MgB2, magnetization, London penetration depth, critical current density. 74.25.Ha; 74.60.Jg; 74.80.Bj.

T. Mishonov and E. Penev, “Thermodynamics of anisotropic-gap and multiband clean BCS superconductors.” E. Penev’s e-mail penev@fhi-berlin.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206118.

V. N. Narozhnyi, G. Fuchs, A. Handstein, A. Gumbel, J. Eckert, K. Nenkov, D. Hinz, O. Gutfleisch, A. Walte, L. N. Bogacheva, I. E. Kostyleva, K.-H. Muller, and L. Schultz, “Comparative Study of Dense Bulk MgB2 Materials Prepared by Different Methods.” Presented at SCRM2002 Conference; submitted to the J. Supercond.: Inc. Novel Magnetism. E-mail narozh@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206513.

S. Okayasu, H. Ikeda, and R. Yoshizaki, “Electron irradiation effects on MgB2 bulk samples.” To be published in Physica C (in press). Department of Materials Science, Research Group for Solid State Physics, Japan Atomic Energy Research Institute, Shirakata, Shirane 2-4, Tokai, Ibaraki 319-1195, Japan; tel. 81 29 282 5466; fax 81 29 282 6716; e-mail okayasu@popsvr.tokai.jaeri.go.jp. Key words: MgB2, electron irradiation, pinning properties. 74.60.Ge; 74.60.Jg; 74.70.Ad.

J. W. Quilty, S. Lee, S. Tajima, and A. Yamanaka, “c-axis Raman Scattering in MgB2: Observation of a Dirty-Limit Gap in the pi-bands.” E-mail quilty@wyvern.phys.s.u-tokyo.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206506.

A. Serquis , Y. T. Zhu, D. E. Peterson, F. M. Mueller, R. K. Schulze, V. F. Nesterenko, and S. S. Indrakanti, “The degradation of MgB2 under ambient environment.” Applied Physics Letters 80 (2002) 4401. E-mail aserquis@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206492.

Z. X. Shi, A. K. Pradhan, M. Tokunaga, K. Yamazaki, T. Tamegai, Y. Takano, K. Togano, H. Kito, and H. Ihara, “Magnetic properties and flux pinning in single crystalline and dense polycrystalline MgB2.” To be published in Physica C (in press). Department of Applied Physics, the University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; tel. 81 3 5841 6863; fax 81 3 5841 6848; e-mail shi@ap6.t.u-tokyo.ac.jp. Key words: MgB2, magnetic properties, upper and lower critical fields, flux pinning. 74.25.Ha; 74.60.Ec; 74.60.Ge.

M. D. Sumption, E. W. Collings, E. Lee, X. L. Wang, S. Soltanian, and S. X. Dou, “Reduction and elimination of external-field AC loss in MgB2/Fe wire by in situ magnetic shielding.” To be published in Physica C (in press). Laboratories for Applied Superconductivity and Magnetism, Department of Materials Science and Engineering, The Ohio State University, 477 Watts Hall, 2041 College Road, Columbus, OH 43210-1179; tel. 614 688 3684; 614 688 3677; e-mail mdsumption+@osu.edu. Key words: superconductor, magnesium diboride, wire, iron sheath, magnetic shielding. 74.72-h.

T. Takasaki, T. Ekino, T. Muranaka, H. Fujii, and J. Akimitsu, “Superconducting gap in polycrystalline MgB2 studied by electron tunneling.” To be published in Physica C (in press). Contact T. Ekino, Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 739-8521, Japan; tel. 81 824 24 6552; fax 81 824 24 0757; e-mail ekino@ipc.hiroshima-u.ac.jp. Key words: tunneling spectroscopy, break junction, MgB2. 74.50.+r; 74.25.Jb; 74.70.Ad.

P. Toulemonde, N. Musolino, H. L. Suo, and R. Flukiger, “Superconductivity in high-pressure synthesized pure and doped MgB2 compounds.” Submitted to Journal of Superconductivity (Proceedings SCRM 2002). E-mail pierre.toulemonde@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206409.

I. K. Yanson, V. V. Fisun, N. L. Bobrov, Yu. G. Naidyuk, W. N. Kang, Eun-Mi Choi, Hyun-Jung Kim, and Sung-Ik Lee, “Phonon structure in I-V characteristic of MgB2 point-contacts.” E-mail yanson@ilt.kharkov.ua; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0206170.

Y. Zhao, Y. Feng, D. X. Huang, T. Machi, C. H. Cheng, K. Nakao, N. Chikumoto, Y. Fudamoto, N. Koshizuka, and M. Murakami, “Doping effect of Zr and Ti on the critical current density of MgB2 bulk superconductors prepared under ambient pressure.” To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 5707; fax 81 3 3536 5705; e-mail zhao@istec.or.jp. Key words: critical currents, metals, alloys and binary compounds, flux pinning. 74.60.Jg; 74.70.Ad; 74.60.Ge.

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July 2002 Preprints

J. M. An, S. Y. Savrasov, H. Rosner, and W. E. Pickett, “Superconducting Li(x)BC and MgB2: Extreme Aspects of Electron-Phonon Coupling.” W. E. Pickett’s e-mail pickett@solid.ucdavis.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207561.

A. Bharathi, S. Jemima Balaselvi, M. Premila, T. N. Sairam, G. L. N. Reddy, C. S. Sundar, and Y. Hariharan, “Synthesis and search for superconductivity in LiBC.” E-mail bharathi@igcar.ernet.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207448.

F. Bouquet, Y. Wang, I. Sheikin, T. Plackowski, A. Junod, S. Lee, and S. Tajima, “Specific heat of single crystal MgB2: a two-band superconductor with two different anisotropies.” E-mail frederic.bouquet@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207141.

Y. Bugoslavsky, L. Cowey, T. J. Tate, G. K. Perkins, J. Moore, Z. Lockman, A. Berenov, J. L. MacManus-Driscoll, A. D. Caplin, L. F. Cohen, H. Y. Zhai, H. M. Christen, M. P. Paranthaman, D. H. Lowndes, M. H. Jo, and M. G. Blamire, “Effective Vortex Pinning in MgB2 thin films.” E-mail y.bugoslav@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207080.

T. Dahm, A. I. Posazhennikova, and K. Maki, “Anisotropic critical fields of MgB2 single crystals.” To appear in Acta Physica Polonica B, proceedings of the International Conference on Strongly Correlated Electron Systems, SCES2002, Krakow, Poland. E-mail dahm@uni-tuebingen.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207521.

S. X. Dou, A. V. Pan, S. Zhou, M. Ionescu, X. L. Wang, J. Horvat, H. K. Liu, and P. R. Munroe, “Superconductivity, critical current density, and flux pinning in MgB{2-x}(SiC){x/2} superconductor after SiC nanoparticle doping.” A. V. Pan’s e-mail pan@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207093.

S. X. Dou, S. Soltanian, J. Horvat, X. L. Wang, P. Munroe, S. H. Zhou, M. Ionescu, H. K. Liu, and M. Tomsic, “Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping.” J. Horvat’s e-mail jhorvat@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207223.

A. Dulcic, M. Pozek, D. Paar, Eun-Mi Choi, Hyun-Jung Kim, W. N. Kang, and Sung-Ik Lee, “Coherence lengths and anisotropy in MgB2 superconductor.” Submitted to PRL. M. Pozek’s e-mail mpozek@phy.hr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207655.

M. R. Eskildsen, M. Kugler, S. Tanaka, J. Jun, S. M. Kazakov, J. Karpinski, and O. Fischer, “Vortex Imaging in the pi-Band of Magnesium Diboride.” Submitted to Phys. Rev. Lett. DPMC, University of Geneva, 24 quai E.-Ansermet, CH-1211 Geneve 4, Switzerland; e-mail morten.eskildsen@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207394. Key words: MgB2, vortex, STM, STS. 74.50.+r; 74.70.Ad; 74.60.Ec.

X. H. Fu, D. S. Wang, Z. Z. Ping, and J. Yang, “Superconducting MgB2 thin films prepared by chemical vapor deposition from diborane.” To be published in Physica C (in press). Department of Physics, Guizhou University, Guiyang 550025, China; fax 86 851 362 1845; e-mail fxh@tmail.gzu.edu.cn. Key words: MgB2, superconductivity, thin film, diborane. 7475; 7460.M; 7470.E.

G. Giunchi, S. Ceresara, G. Ripamonti, A. DiZenobio, S. Rossi, S. Chiarelli, M. Spadoni, R. Wesche, and P. L. Bruzzone, “High performance new MgB2 superconducting hollow wires.” Presented at BOROMAG , Genova 17-19 June 2002; submitted to Supercond. Sci. Technol. E-mail giunchig@edison.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207488.

S. K. Gupta, Shashwati Sen, Ajay Singh, D. K. Aswal, J. V. Yakhmi, Eun-Mi Choi, Hyun-Jung Kim, Kijoon H. P. Kim, Seungje Choi, Hyun-Sook Lee, W. N. Kang, and Sung-Ik Lee, “I-V Characteristics Measurements to Study Nature of Vortex State and Dissipation in MgB2 Thin Films.” Submitted to Phys. Rev. B. Thin Film Devices Section, Technical Physics & Prototype Engineering Division, BARC, Mumbai 400085, India; tel. 91 22 5593863; fax 91 22 5505151; e-mail: drgupta@magnum.barc.ernet.in. Key words: Vortex glass transition, I-V characteristics, MgB2, Thin Films, Dissipation. 74.70 Ad; 74.60 Ge; 74.20 De.

Matthias A. Hein, “Perspectives of superconducting MgB2 for microwave applications.” E-mail mhein@venus.physik.uni-wuppertal.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207226.

D. G. Hinks, J. D. Jorgensen, Hong Zheng, and S. Short, “Synthesis and Stoichiometry of MgB2.” Accepted for publication in Physica C. E-mail hinks@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207161.

J. Horvat, S. Soltanian, X. L. Wang, and S. X. Dou, “Magnetic shielding in MgB2/Fe superconducting wires.” E-mail jhorvat@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207727.

Won Nam Kang, Hyeong-Jin Kim, Eun-Mi Choi, Kijoon H. P. Kim, and Sung-Ik Lee, “Growth and transport properties of c-axis-oriented MgB2 thin films.” To be published in Physica C (in press). Department of Physics, National Creative Research Initiative Center for Superconductivity, Pohang University of Science and Technology, Pohang 790-784, South Korea; tel. 82 54 279 5847; fax 82 54 279 5299; e-mail wnkang@postech.ac.kr. Key words: MgB2 superconductor, thin film, critical current density. 74.60.Jg; 74.60.Ge; 74.70.Ad.

J. Karpinski, M. Angst, J. Jun, S. M. Kazakov, R. Puzniak, A. Wisniewski, J. Roos, H. Keller, A. Perucchi, L. Degiorgi, M. Eskildsen, P. Bordet, L. Vinnikov, and A. Mironov, “MgB2 single crystals: high pressure growth and anisotropic properties.” Submitted to Supercond. Sci. Technol. (Proceedings of Boromag Conference). M. Angst’s e-mail angst@phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207263.

V. G. Kogan, “Free energy and torque for superconductors with different anisotropies of H{c2} and \lambda.” E-mail kogan@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207688.

S. Lee, T. Masui, H. Mori, Yu. Eltsev, A. Yamamoto, and S. Tajima, “Crystal growth and characterization of MgB2: Relation between structure and superconducting properties.” Proceedings of International Workshop on Superconductivity in Magnesium Diboride and Related Materials "BOROMAG", 17-19 June 2002, Genoa, Italy (submitted to Supercond. Sci. and Technol.). E-mail lee@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207247.

Y. Machida, S. Sasaki, H. Fujii, M. Furuyama, I. Kakeya, and K. Kadowaki, “Study of superconducting properties of MgB2.” E-mail machida@lipro.rlem.titech.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207658.

P. Miranovic, K. Machida, and V. G. Kogan, “Anisotropy of the upper critical field in superconductors with anisotropic gaps. Anisotropy parameters of MgB2.” E-mail pedja@mp.okayama-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207146.

M. P. Paranthaman, D. K. Christen, H. M. Christen, J. R. Thompson, H. R. Kerchner, C. Cantoni, and H. Y. Zhai, “Growth of high current density MgB2 films using ex-situ precursor approach.” To be published in Physica C (in press). Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Building 4500 South, MS-6100, P.O. Box 2008, Oak Ridge, TN 37831-6100; tel. 865 574 5045; fax 865 574 4939; e-mail paranthamanm@ornl.gov. Key words: MgB2 films, Al2O3 substrates, E-beam evaporation, transport properties. 74.70.-b; 74.76.Db.

S. H. Pawar, A. B. Jadhav, P. M. Shirage, and D. D. Shivagan, “Electrochemical synthesis of superconducting MgB2 thin films: a novel potential technique.” Submitted to Journal of Physics: Condensed Matter. Superconductivity Lab., School of Energy Studies, Department of Physics, Shivaji University, Kolhapur- 416 004, India; e-mail shpawar_phy@unishivaji.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207406. Key words: electrodeposition, MgB2, thin films. 74.70.Ad, 81.15.Pq, 74.76.-w.

A. V. Pronin, K. Pucher, P. Lunkenheimer, A. Krimmel, and A. Loidl, “Electronic and optical properties of LiBC.” E-mail pronin@mx.ran.gpi.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207299.

C. Senatore, M. Polichetti, D. Zola, T. Di Matteo, G. Giunchi, and S. Pace, “Vortex dynamics and pinning properties analysis of MgB2 bulk samples by ac susceptibility measurements.” Proceedings of Boromag Workshop. E-mail carmelo@sa.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207580.

P. Toulemonde, N. Musolino, and R. Flukiger, “High-pressure synthesis of pure and doped superconducting MgB2 compounds.” Submitted to Supercond. Sci. Technol. (Proceedings of BOROMAG, Genova, Italy, June 17-19, 2002). E-mail pierre.toulemonde@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207033.

Masayoshi Wake, “Superconductivity applications in accelerator projects beyond LHC.” To be published in Physica C (in press). KEK High-Energy Accelerator Research Organization, Oho, Tsukuba 305-0801, Japan; tel. 81 298 645464; fax 81 298 64 3209; e-mail wake@post.kek.jp. Key words: accelerator, Nb3Sn, MgB2, VLHC, NLC, muon collider, cavity, superconducting magnet.

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August 2002 Preprints

V. Braccini, L. D. Cooley, S. Patnaik, P. Manfrinetti, A. Palenzona, A. S. Siri, and D. C. Larbalestier, “Significant enhancement of irreversibility field in clean-limit bulk MgB2.” Submitted to Applied Physics Letters. L. D. Cooley’s e-mail ldcooley@facstaff.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208054.

Shi X. Dou, Joseph Horvat, Saeid Soltanian, Xiao L. Wang, Meng J. Qin, Shi H. Zhou, Hua K. Liu, and Paul G. Munroe, “Transport critical current density in Fe-sheathed nano-SiC doped MgB2 wires. Presented at ASC 2002, Houston. Xiao L. Wang’s e-mail xiaolin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208215.

G. Giunchi, S. Ceresara, L. Martini, V. Ottoboni, S. Chiarelli, and M. Spadoni, “Superconducting Properties of Highly Dense MgB2 Bulk Materials.” Presented at the Conference SATT11, Vietri S.M.(SA) Italy, March 19-22, 2002. E-mail giunchig@edison.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208043.

Giovanni Giunchi, “High Density MgB2 Obtained by Reactive Liquid Mg Infiltration.” Presented at the Conference SATT11, Vietri S.M.(SA) Italy, March 19-22, 2002; end accepted for publication in Int. J. of Modern Physics B. E-mail giunchig@edison.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208040.

R. S. Gonnelli, D. Daghero, G. A. Ummarino, V. A. Stepanov, J. Jun, S. M. Kazakov, and J. Karpinski, “Direct evidence for two-band superconductivity in MgB2 single crystals from directional point-contact spectroscopy in magnetic field.” E-mail gonnelli@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208060.

Carsten Hucho, Peter Schilbe, and Klaus Luders, “Interpretation of the irreversibility line of polycrystalline MgB2.” To be published in Physica C (in press). Paul-Drude-Institut fur Festkorperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany; e-mail hucho@pdi-berlin.de. 74.60.-w; 74.60.Ge; 74.25.Dw; 74.25.Ha.

Jihoon Kim, Rakesh K. Singh, Nathan Newman, and John M. Rowell, “Thermochemistry of MgB2 Thin Film Synthesis.” ASC2002. E-mail jihoon.kim@asu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208476.

Hiroaki Kusunose, T. M. Rice, and Manfred Sigrist, “Electronic Thermal Conductivity of Multi-Gap Superconductors with Application to MgB2.” E-mail hiro@itp.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208113.

Sang Young Lee, J. H. Lee, J. Lim, H. N. Lee, S. H. Moon, B. Oh, and M.A. Hein, “Effects of Ion Milling on the Microwave Properties of MgB2 Films.” Presented at 2002 Applied Superconductivity Conference, Houston, Texas, Aug. 4-9, 2002. E-mail sylee@boulder.nist.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208304.

B. Lorenz, J. Lenzi, J. Cmaidalka, R. L. Meng, Y. Y. Sun, Y. Y. Xue, and C. W. Chu, “Superconductivity in the C32 Intermetallic Compounds AAl(2-x)Si(x), with A=Ca and Sr, and 0.6<x<1.2.” E-mail blorenz@bayou.uh.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208341.

Yu. G. Naidyuk, O. E. Kvitnitskaya, I. K. Yanson, S.-L. Drechsler, G. Behr, and S. Otani, “Electron-phonon interaction in transition metal diborides TB2 (T=Zr, Nb, Ta) studied by point-contact spectroscopy.” E-mail naidyuk@ilt.kharkov.ua; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208020.

Morsy M. A. Sekkina and Khaled M. Elsabawy, “Two dimensional {gamma}-irradiations for promoted structural properties of MgB2 superconductors.” To be published in Physica C (in press). Contact Khaled M. Elsabawy, C/o Jansen Gp., Max Plank Institute for Solid State Research, Heissenbergstrasse 1, 70569 Stuttgart, Germany; fax 49 711 689 1010; e-mail k.elsabawy@fkf.mpg.de. Key words: superconductor, MgB2, SEM, x-ray, {gamma}-irradiation.

D. Souptel, G. Behr, W. Loser, W. Kopylov, and M. Zinkevich, “Crystal growth of MgB2 from Mg-Cu-B melt flux and superconducting properties.” E-mail d.suptel@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208300.

Dmitri Souptel, Zakir Hossain, Gunter Behr, Wolfgang Loser, and Christoph Geibel, “Synthesis and physical properties of LiBC intermetallics.” E-mail d.suptel@ifw-dresden.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208346.

H. L. Suo, P. Lezza, D. Uglietti, C. Beneduce, V. Abacherli, and R. Flukiger, “Transport critical current densities and n factors in mono- and multifilamentary MgB2/Fe tapes and wires using fine powders.” Submitted to ASC 2002. E-mail hongli.suo@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208133.

K. Tanaka, M. Okada, H. Kumakura, H. Kitaguchi, and K. Togano, “Fabrication and transport properties of MgB2 wire and coil.” To be published in Physica C (in press). Hitachi Research Laboratory, Hitachi Ltd., Omika-cho 7-1-1, Hitachi, Ibaraki 319-1292, Japan; tel. 81 294 27 5049; fax 81 294 27 5060; e-mail ktanaka@gm.hrl.hitachi.co.jp. Key words: MgB2, coil, tape, critical current density, bending strain, and solenoid. 85.25.K.

K. Ueda and M. Naito, “Tunnel junctions on as-grown superconducting MgB2 thin films.” Proceedings of ASC2002 (IEEE, Trans. Appl. Super.). E-mail kueda@will.brl.ntt.co.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208571.

X. L. Wang, S. H. Zhou, M. J. Qin, P. R. Munroe, S. Soltanian, H. K. Liu, and S. X. Dou, “Significant enhancement of flux pinning in MgB2 superconductor through nano-Si addition.” E-mail xiaolin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208349.

Yuxing Wang, Frederic Bouquet, Ilya Sheikin, Pierre Toulemonde, Bernard Revaz, Michael Eisterer, Harald W. Weber, Joerg Hinderer, and Alain Junod, “Specific heat of MgB2 after irradiation.” E-mail yuxing.wang@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208169.

A. Yamamoto, C. Takao, T. Masui, M. Izumi, and S. Tajima, “High-pressure synthesis of superconducting Nb {1-x}B2 (x = 0-0.48) with the maximum Tc = 9.2 K.” Accepted for publication in Physica C. E-mail yamamoto@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0208331.

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September 2002 Preprints

J. M. An, H. Rosner, S. Y. Savrasov, and W. E. Pickett, “Vibrational Modes in LiBC: Theory Compared with Experiment.” Physica B (in press). W. E. Pickett’s e-mail pickett@solid.ucdavis.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209256.

J. M. An, S. Y. Savrasov, H. Rosner, and W. E. Pickett, “Extreme Electron-Phonon Coupling in Boron-based Layered Superconductors.” W. E. Pickett’s e-mail pickett@solid.ucdavis.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0207542.

S. Jemima Balaselvi, A. Bharathi, V. Sankara Sastry, G. L. N. Reddy, and Y. Hariharan, “Effect of electron and hole doping on the superconducting and normal state properties of MgB2.” Submitted to DAE Solid State Physics Symposium, Dec. 2002, Chandigarh, Punjab, INDIA. A. Bharathi’s e-mail bharathi@igcar.ernet.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209200.

D. Daghero, R. S. Gonnelli, G. A. Ummarino, V. A. Stepanov, J. Jun, S. M. Kazakov, and J. Karpinski, “Point-contact spectroscopy in MgB2 single crystals in magnetic field.” R. S. Gonnelli’s e-mail gonnelli@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209516.

S. Deemyad, T. Tomita, J. J. Hamlin, B. R. Beckett, J. S. Schilling, D. G. Hinks, J. D. Jorgensen, S. Lee, and S. Tajima, “Dependence of the superconducting transition temperature of single- and polycrystalline MgB2 on hydrostatic pressure.” Invited paper for a special edition of Physica on MgB2. J. S. Schilling’s e-mail schill@wuphys.wustl.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209270. Key words: MgB2, single crystal, pressure effects, superconductivity. 74.62.Fj, 74.70.Ad, 74.62.Dh.

M. R. Eskildsen, M. Kugler, G. Levy, S. Tanaka, J. Jun, S. M. Kazakov, J. Karpinski, and O. Fischer, “Scanning Tunneling Spectroscopy on Single Crystal MgB2.” Submitted to Physica C. E-mail morten.eskildsen@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209345.

V. V. Flambaum, G. A. Stewart, G. J. Russell, J. Horvat, and S. X. Dou, “The effect of hydrogenation on the superconducting transition temperature of MgB2.” To be published in Physica C (in press). Contact G. J. Russell, School of Physics, University of New South Wales, Sydney, NSW 2052, Australia; tel. 61 2 9385 4591; fax 61 2 9385 6060; e-mail g.russell@unsw.edu.au. Key words: MgB2, hydrogenation, superconducting transition temperature.

R. S. Gonnelli, D. Daghero, G. A. Ummarino, V. A. Stepanov, J. Jun, S. M. Kazakov, and J. Karpinski, “Independent determination of the two gaps by directional point-contact spectroscopy in MgB2 single crystals.” Proceedings of the BOROMAG Conference, June 17-19, Genoa, Italy. E-mail gonnelli@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209472.

Motoharu Imai, Kenji Nishida, Takashi Kimura, Hideaki Kitazawa, Hideki Abe, Hijiri Kito, and Kenji Yoshii, “Superconductivity of M_I(M_II0.5,Si_0.5)_2 (M_I = Sr and Ba, M_II = Al and Ga), ternary silicides with the AlB2-type structure.” To be published in Physica C (in press). National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; tel. 81 298 59 2814; fax 81 298 59 2801; e-mail imai.motoharu@nims.go.jp. Key words: superconductivity, silicide, AlB2-type structure, Sr(Al,Si)2. 74.10.+v; 61.66.Fn; 74.70.Ad.

W. N. Kang, Eun-Mi Choi, Hyeong-Jin Kim, Hyun-Jung Kim, and Sung-Ik Lee, “Growth of superconducting MgB2 thin films via postannealing techniques.” E-mail wnkang@postech.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209226.

P. Kovac, I. Husek, Ch. Grovenor, and Ch. Salter, “Properties of As-deformed and Post-annealed MgB2/Fe(Fe-alloy) Composite Wires Citation.” Submitted to Supercond. Sci. Technol. (Proceedings of Boromag Conference); preprint available in pdf format. Institute of Electrical Enginnering, Slovak Academy of Sciences, Dubravska cesta 9, 842 39 Bratislava, Slovak Republic; tel. 421 2 5477 5823-2841; fax 421 2 5477 5816; e-mail elekkova@savba.sk. Key words: MgB2/Fe(SS), inter-reaction, critical currents, engineering current density. 66.30.Ny; 74.60.Jg.

P. Martinez-Samper, J. G. Rodrigo, G. Rubio-Bollinger, H. Suderow, S. Vieira, S. Lee, and S. Tajima, “Scanning Tunneling Spectroscopy in MgB2.” Submitted to Physica C. H. Suderow’s e-mail hermann.suderow@uam.es; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209387.

A. Matsumoto, H. Kumakura, H. Kitaguchi, H. Fujii, and K. Togano, “The annealing effects of MgB2 superconducting tapes.” To be published in Physica C (in press). National Institute for Materials Science, Superconducting Materials Center, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; fax 81 298 59 2301; e-mail matsumoto.akiyoshi@nims.go.jp.

Todor M. Mishonov, Evgeni S. Penev, Joseph O. Indekeu, and Valery L. Pokrovsky, “Specific heat discontinuity in dirty anisotropic BCS superconductors.” E-mail todor.mishonov@fys.kuleuven.ac.be; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209342.

H. Schmidt, J. F. Zasadzinski, K. E. Gray, and D. G. Hinks, “Break-Junction Tunneling on MgB2.” Submitted to Physica C. E-mail hschmidt@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209447.

Abhay Shukla, Matteo Calandra, Matteo d’Astuto, Michele Lazzeri, Francesco Mauri, Christophe Bellin, Michael Krisch, J. Karpinski, S. M. Kazakov, J. Jun, D. Daghero, and K. Parlinski, “Phonon dispersion and lifetimes in MgB2.” E-mail abhay.shukla@lmcp.jussieu.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209064.

Prabhakar P. Singh, “Fermi-surface induced variation in Tc in MgB2 alloys.” To be published in Physica C (in press). Department of Physics, Indian Institute of Technology, Powai, Mumbai 400076, India; tel. 91 225 76 7593; fax 91 225 76 7552; e-mail ppsingh@phy.iitb.ac.in.

T. Sun, X. P. Zhang, Y. G. Zhao, R. Shen, K. Wang, L. W. Zhang, B. S. Cao, Y. H. Xiong, P. J. Li, and H. H. Wen, “Study of the reactions between MgB2 and Ag at high temperature.” To be published in Physica C (in press). Contact Y. G. Zhao, Department of Physics, Tsinghua University, Beijing 100084, China; e-mail ygzhao@tsinghua.edu.cn. Key words: MgB2, Ag, Mg0.5Ag0.5, MgB4, reaction.

L. Ya. Vinnikov, J. Karpinski, S. M. Kazakov, J. Jun, J. Anderegg, S. L. Bud'ko, P. C. Canfield, “Observation of vortex structure in MgB2 single crystals by Bitter decoration technique.” S. L. Bud'ko’s e-mail budko@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0209448.

Z. H. Wang, J. Gao, J. Fang, L. Qiu, S. Y. Ding, J. L. Chen, and X. X. Yao, “Dissipative resistivity and activation energy U(T,H) in the textured superconducting MgB2 bulk.” To be published in Physica C (in press). Department of Physics, Quantum-Transport and Superconductivity Laboratory, Pho-hang University of Science and Technology, San 31 Hyoja-dong, Phohang, South Korea; tel. 85 25 359 3661; fax 85 25 359 5535; e-mail zhwang@netra.nju.edu.cn. Key words: textured MgB2, activation energy, coupling. 74.70.Ad; 74.60.Ge; 74.25.Fy.

M. Zouaoui, A. M’chirgui, F. Ben Azzouz, B. Yangui, and M. Ben Salem, “Electron transport properties of silver added polycrystalline MgB2.” To be published in Physica C (in press). Contact M. Ben Salem, Departement de Physique, Faculte des Sciences de Bizerte, Laboratoire de Physique des Materiaux, Zarzouna 7021, Tunisia; tel. 216 72 591 906; fax 216 72 590 566; e-mail ali-mchirgui@fsb.rnu.tn. Key words: MgB2, normal state, superconductivity. 74.25.-q; 74.25.Fy; 74.62.Bf.

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October 2002 Preprints

S. P. Ananev, V. A. Grinenko, V. A. Keilin, E. P. Krasnoperov, P. A. Levit, and V. A. Stoliarov, "MgB2 synthesis in closed volume and pinning potential." E. P. Krasnoperov’s e-mail kep@isssph.kiae.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210317.

M. Angst, R. Puzniak, A. Wisniewski, J. Roos, H. Keller, P. Miranovic, J. Jun, S. M. Kazakov, and J. Karpinski, "Anisotropy of the superconducting state properties and phase diagram of MgB2 by torque magnetometry on single crystals." Physica C in print (invited paper for a special issue on MgB2). E-mail angst@phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210701.

Mohamed H. Badr and K.-W. Ng, "New heat treatment to prepare high quality polycrystalline and single crystal MgB2 in single process." E-mail mhbadr0@uky.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210384.

F. Bouquet, Y. Wang, I. Sheikin, P. Toulemonde, M. Eisterer, H. W. Weber, S. Lee, S. Tajima, and A. Junod, "Unusual effects of anisotropy on the specific heat of ceramic and single crystal MgB2." Accepted in the Physica C special issue on MgB2. E-mail frederic.bouquet@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210706.

C. H. Cheng and Y. Zhao, "Self-heating and ac losses in superconductors." To be published in Physica C (in press). Contact Y. Zhao, Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wales, PO Box 1, Sydney, NSW 2052, Australia; tel. 61 2 9385 5986; fax 61 2 9385 5956; e-mail y.zhao@unsw.edu.au. Key words: AC loss, self-heating effect, temperature distribution, critical current distribution. 74.25.-Ha; 74.60.-w; 74.60.Ge.

C. H. Cheng, Y. Zhao, X. T. Zhu, J. Nowotny, C. C. Sorrell, T. Finlayson, and H. Zhang, "Chemical doping effect on the crystal structure and superconductivity of MgB2." To be published in Physica C (in press). Contact Y. Zhao, Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Sydney, NSW 2052, Australia; tel. 61 2 9385 5986; fax 61 2 9385 5956; e-mail y.zhao@unsw.edu.au. Key words: MgB2, chemical doping, Vegard-relationship, superconductivity. 74.62.Bf; 74.62.Dh.

E. W. Collings, E. Lee, M. D. Sumption, M. Tomsic, X. L. Wang, S. Soltanian, and S. X. Dou, "Continuous- band batch-processed MgB2/Fe strands--transport and magnetic properties." To be published in Physica C (in press). Laboratories for Applied Superconductivity and Magnetism (LASM), Department of Materials Science and Engineering, The Ohio State University, 477 Watts Hall, 2041 College Rd., Columbus, OH 43210-1179; e-mail collings@mse.eng.ohio-state.edu. Key words: MgB2, critical current, AC loss, Hc1.

O. F. de Lima and C. A. Cardoso, "Critical current density anisotropy of aligned MgB2 crystallites." To be published in Physica C (in press). Instituto de Fisica Gleb Wataghin, UNICAMP, C.P. 6165, 13083-970 Campinas, SP, Brazil; fax 55 19 3289 3137; e-mail delima@ifi.unicamp.br. Key words: MgB2 anisotropy, MgB2 crystallites, magnesium diboride, critical current anisotropy. 74.25.Ha; 74.60.Ec; 74.60.Jg; 74.70.Ad.

J. K. Dewhurst, S. Sharma, C. Ambrosch-Draxl, and B. Johansson, "First-principles Calculation of Superconductivity in Hole-doped LiBC: Tc=65 K." E-mail kay.dewhurst@uni-graz.at; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210704.

Qing-rong Feng, Xun Chen, Yu-hao Wang, Xin Wang, Guang-cheng Xiong, and Zheng-xiang Gao, "In situ resistance measurement of superconducting MgB2 in flowing argon atmosphere." To be published in Physica C (in press). Department of Physics and Mesoscopic, Physics National Laboratory, Peking University, Beijing 100871, China; tel./fax 86 10 62751731; e-mail qrfeng@pku.edu.cn. Key words: MgB2 superconductor, solid-state reaction in argon atmosphere, in situ resistance measuring. 74.70.-b; 74.90.+n.

Y. Feng, G. Yan, Y. Zhao, C. F. Liu, B. Q. Fu, L. Zhou, L. Z. Cao, K. Q. Ruan, X. G. Li, L. Shi, and Y. H. Zhang, "Superconducting properties of MgB2 wires and tapes with different metal sheathes." To be published in Physica C (in press). Northwest Institute for Nonferrous Metal Research, P.O. Box 51, Xi'an 710016, PR China; tel. 86 29 623 1079; fax 86 29 622 4487; e-mail yfeng@c-nin.com. Key words: MgB2 superconductors, critical current density, superconducting tapes and wires. 74.60.Jg; 74.72.Yg; 74.80.Bj; 74.62.Bf.

V. Ferrando, S. Amoruso, E. Bellingeri, R. Bruzzese, P. Manfrinetti, D. Marre', R. Velotta, X. Wang, and C. Ferdeghini, "Growth methods of c-axis oriented MgB2 thin films by pulsed laser deposition." Paper presented at Boromag Workshop, Genoa 17-19 June 2002; in press on SUST. E-mail ferdeghini@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210048.

B. Q. Fu, Y. Feng, Y. Zhao, A. K. Pradhan, C. H. Cheng, P. Ji, X. H. Liu, C. F. Liu, G. Yan, L. Zhou, and K. F. Yau, "Microstructures and superconducting properties in Ti-doped MgB2/Ta/Cu tape." To be published in Physica C (in press). Northwest Institute for Nonferrous Metal Research, P.O. Box 51, Xi'an, Shaanxi 710016, PR China; tel. 86 296 231079; fax 86 296 224487; e-mail: fubq@etang.com. Key words: MgB2, doping, critical current density. 74.60.Jg; 74.72.Yg; 74.80.Bj; 74.62.Bf.

A. Agliolo Gallitto, S. Fricano, and M. Li Vigni, "Microwave Surface Resistance and Upper-Critical-Field Anisotropy of MgB2 Superconductor." Submitted to Physica C. Dipartimento di Scienze Fisiche e Astronomiche Via Archirafi 36, 90123 Palermo, Italy; tel. 390916234207 – fax 390916162461; e-mail agliolo@fisica.unipa.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210178. Key words: MgB2, microwave surface impedance, fluxon dynamics. 74.25.Nf; 74.25.Ha; 74.60.Ge; 74.70.Ad.

D. W. Gu, Y. M. Cai, J. K. F. Yau, Y. G. Cui, T. Wu, G. Q. Yuan, L. J. Shen, and X. Jin, "Efect of Pb substitution in bulk superconducting MgB2." To be published in Physica C (in press). Department of Physics, Department of Material Science, Nanjing University of Technology, Nanjing 210009, China. Key words: superconductivity, Pb-doping, coherence length, MgB2. 74.70; 74.25.

Y. S. Han, J. K. F. Yau, G. Q. Yuan, X. N. Xu, D. W. Lu, L. J. Shen, and X. Jin, "Pinning effects and current density broadening of resistance on MgB2." To be published in Physica C (in press). Department of Physics, Center for Advanced Studies in Science and Technology of Microstructures, Nanjing University, Nanjing 210093, China; e-mail vsmlab@nju.edu.cn. Key words: current density broadening of resistance, effective potential. 74.60.Ge.

Mi. Jergel, E. Andrade, S. Chromik, Ma. Jergel, C. Falcony, V. Strbik, M. F. Rocha, and E. P. Zavala, "Composition Depth Profiles of Superconducting MgB2 Thin Films Determined by Ion Beam Analysis Methods." Accepted for publication in Physica C: Superconductivity and its Applications; also available at http://www.fis.cinvestav.mx/~cfalcony/Public/Jergel.pdf. Depto. de Fisica, CINVESTAV-IPN, Apdo.Postal 14-740, Mexico, D.F., 07000 Mexico; e-mail: mjergel@fis.cinvestav.mx. Key words: thin MgB2 films, elemental composition, RBS, nuclear reaction method. 29.90.+r; 74.76.Bz; 82.89.Yc.

H. L. Li, K. Q. Ruan, S. Y. Li, Y. Yu, C. Y. Wang, and L. Z. Cao, "Upper critical field and the effect of Li doping on the activation energy in MgB2." To be published in Physica C (in press). Contact L. Z. Cao, Structure Research Laboratory, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China; tel. 86 551 360 1064; fax 86 551 360 1073; e-mail caolz@ustc.edu.cn. Key words: MgB2 superconductor, upper critical field, activation energy. 74.70.Ad; 74.60.Ge; 74.25.Fy.

C. F. Liu, G. Yan, S. J. Du, W. Xi, Y. Feng, P. X. Zhang, X. Z. Wu, and L. Zhou, "Effect of heat-treatment temperatures on density and porosity in MgB2 superconductor." To be published in Physica C (in press). Northwest Institute for Non-ferrous Metal Research, P.O. Box 51, Xi'an, Shaanxi 710016, PR China; fax 86 29 622 4487; e-mail cfliu_nin@sohu.com. Key words: MgB2, density, porosity. 74.72.Yg.

T. Masui, S. Lee, and S. Tajima, "Origin of superconductivity transition broadening in MgB2." To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Tokyo 135-0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5705; e-mail masui@istec.or.jp. Key words: MgB2, resistivity, critical field, anisotropy. 74.70.Ad; 74.25.Ha; 74.60.Ec.

C. P. Moca and B. Janko, "Signatures of interband scattering in spectroscopic experiments on MgB2." E-mail mocap@uoradea.ro; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210445.

T. A. Prikhna, W. Gawalek, Ya. M. Savchuk, V. E. Moshchil, N. V. Sergienko, A. B. Surzhenko, M. Wendt, S. N. Dub, V. S. Melnikov, Ch. Schmidt, and P. A. Nagorny, "High-pressure synthesis of a bulk superconductive MgB2-based material." To be published in Physica C (in press). Institute for Superhard Materials, 2 Avtozavodskaya Str., Kiev 04074, Ukraine; fax 380 44 468 86 25; e-mail prikhna@iptelecom.net.ua. Key words: MgB2-based bulk superconductor, Ta, high-pressure synthesis. 74.72.Yg; 74.62.Bf.

M. Putti, V. Braccini, E. Galleani d'Agliano, F. Napoli, I. Pallecchi, A. S. Siri, P. Manfrinetti, and A. Palenzona, "Thermal conductivity of MgB2 in the superconducting state." E-mail putti@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210175.

M. Putti, V. Braccini, E. Galleani, F. Napoli, I. Pallecchi, A. S. Siri, P. Manfrinetti, and A. Palenzona, "Two-band effects in transport properties of MgB2." Presented at the BOROMAG Workshop, June 17-19 2002, Genoa, Italy. E-mail putti@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210047.

R. A. Ribeiro, S. L. Bud'ko, C. Petrovic, and P. C. Canfield, "Carbon doping of superconducting magnesium diboride." Submitted to Physica C. E-mail ribeiro@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210530.

K. Q. Ruan, H. L. Li, Y. Yu, C. Y. Wang, L. Z. Cao, C. F. Liu, S. J. Du, G. Yan, Y. Feng, X. Wu, J. R. Wang, X. H. Liu, P. X. Zhang, X. Z. Wu, and L. Zhou, "Transport critical current density of Fe sheath MgB2 tapes sintered at different temperatures." To be published in Physica C (in press). Structure Research Laboratory and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, PR China; tel. 86 551 3601064; fax 86 551 3601073; e-mail kqruan@ustc.edu.cn. Key words: Fe sheath MgB2 tape, critical current density, irreversibility field. 74.70.Ad; 74.62.Bf.

S. I. Schlachter, W. Goldacker, J. Reiner, S. Zimmer, B. Liu, and B. Obst, "Influence of the Preparation Process on Microstructure, Critical Current Density and Tc of MgB2 Powder-In-Tube Wires." To be published in Advances in Cryogenic Engineering. E-mail sonja.schlachter@itp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210591.

Jing-qin Shen, Ming-hu Fang, Yi Zheng, Hong-tao Wang, Yi Lu, and Zhu-an Xu, "Study of high temperature resistivity and thermal stability of superconductor MgB2." To be published in Physica C (in press). Contact Zhu-an Xu, Department of Physics, Zhejiang University, Hangzhou 310027, China; tel./fax 86 571 87951913; e-mail zhuan@css.zju.edu.cn. Key words: MgB2 superconductor, electrical resistivity, Bloch-Gruneisen theory. 74.70.Ad; 74.25.Fy; 74.25.Kc.

Prabhakar P. Singh, "Electron-Phonon Interaction in NbB2 : A Comparison with MgB2." E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210091.

Sachiko Takano, Yutaka Iriyama, Yoshihide Kimishima, and Masatomo Uehara, "Chemical substitution effects of Si and C on AlB2-type superconductor Y2PdGe3." To be published in Physica C (in press). Contact Masatomo Uehara, Department of Physics, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan; tel./fax 81 45 339 4187; e-mail uehara@ynu.ac.jp. Key words: Y2PdGe3, AlB2-structure, doping effect, superconductivity. 74.62.Dh; 74.70.Ad; 74.25.Dw.

H.-J. Tao, Z.-Z. Li, Y. Xuan, Z.-A. Ren, G.-C. Che, B.-R. Zhao, and Z.-X. Zhao, "Josephson effects in MgB2 break junctions and MgB2/Nb point contacts." To be published in Physica C (in press). National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080, PR China; tel. 86 10 8264 9184; fax 86 10 8264 9531; e-mail hjtao@aphy.iphy.ac.cn. Key words: Josephson effects, MgB2, break junction, point contact. 74.50.+r; 74.80.Fp; 74.70.-b.

K Ueda and M. Naito, "In-situ growth of superconducting MgB2 thin films by molecular beam epitaxy." Submitted to J. Appl. Phys. E-mail kueda@will.brl.ntt.co.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210259.

M. Wang, X. Y. Su, Z. J. Xu, and F. Wang, "A two-band model with electron-phonon and non-electron-phonon interaction for MgB2 system." To be published in Physica C (in press). Department of Physics, Qufu Normal University, Qufu, Shandong 273165, China; tel. 86 537 4456972; fax 86 537 4455433; e-mail xiyusu@qfnu.edu.cn. Key words: superconductivity, two-band model, non-electron-phonon coupling, self consistent method. 74.20.

Lijun Wu, Yimei Zhu, T. Vogt, Haibin Su, J. W. Davenport, and J. Tafto, "Valence electron distribution in MgB2 studied by accurate diffraction measurements and first principle calculations." E-mail ljwu@bnl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0210107.

J. Y. Xiang, D. N. Zheng, J. Q. Li, S. L. Li, H. H. Wen, and Z. X. Zhao, "Effects of Al doping on the superconducting and structural properties of MgB2." To be published in Physica C (in press). Contact D. N. Zheng, National Laboratory for Superconductivity, Institute of Physics and the Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China; fax 86 10 8264 9531; e-mail dzheng@ssc.iphy.ac.cn. Key words: MgB2, superstructure, critical currents density, flux pinning. 74.60.Ec; 74.62.Dh; 74.60.Jg.

H. Xiao, W. Peng, W. H. Song, R. C. Ma, L. Zhang, J. J. Du, and Y. P. Sun, "Influence of Mg deficiency on the properties of MgB2." To be published in Physica C (in press). Key Laboratory of Internal Friction and Defects in Solids, Institute of Solid State Physics, Chinese Academy of Sciences, PO Box 1129, Hefei 230031, PR China; fax 86 551 5591434; e-mail jjdu@mail.issp.ac.cn. Key words: MgB2, deficiency, lattice parameter. 74.62.Dh; 74.70.Ad; 74.25.Fy.

H. Xiao, W. H. Song, J. J. Du, Y. P. Sun, and J. Fang, "Preparation and superconductivity of MgB2/Cu tapes." To be published in Physica C (in press). Key Laboratory of Internal Friction and Defects in Solids, Institute of Solid State Physics, Chinese Academy of Sciences, PO Box 1129, Hefei 230031, PR China; fax 86 551 559 1434; e-mail jjdu@mail.issp.ac.cn. Key words: MgB2/Cu tape, flux pinning, strain, defect. 74.25.Fy; 74.60.Ge; 74.62.Dh; 74.70.Ad.

G. Yan, B. Q. Fu, Y. Feng, C. F. Liu, P. Ji, X. Z. Wu, L. Zhou, L. Z. Cao, K. Q. Ruan, and X. G. Li, "Preparation and transport Jc(B) properties of Fe-clad MgB2 wires." To be published in Physica C (in press). Northwest Institute for Non-ferrous Metal Research, P.O. Box 51, Xi’an, Shaanxi 710016, PR China; fax 86 29 622 4487; e-mail guoyan@21cn.edu.cn. Key words: MgB2, wire, in situ fabrication, transport Jc. 74.72.Yg; 74.80.Bj; 74.62.Bf; 74.60.Jg.

Y. Zhao, C. H. Cheng, Y. Feng, T. Machi, D. X. Huang, L. Zhou, N. Koshizuka, and M. Murakami, "Ti doping on the flux pinning and chemical stability against water of MgB2 bulk material." To be published in Physica C (in press). Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wales, PO Box 1, Sydney, NSW 2052, Australia; tel. 61 2 9385 5986; fax 61 2 9385 5956; e-mail y.zhao@unsw.edu.au. Key words: MgB2, critical current density, microstructure. 74.60.Jg; 74.70.Ad; 74.60.Ge.

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November 2002 Preprints

Hideki Abe, Kenji Yoshii, Kenji Nishida, and Motoharu Imai, "Electroplating of superconducting films of MgB2 from molten salts." E-mail abe.hideki@nims.go.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211310.

Etienne Boaknin, M. A. Tanatar, Johnpierre Palgione, D. Hawthorn, F. Ronning, R. W. Hill, M. Sutherland, Louis Taillefer, Jeff Sonier, S. M. Hayden, and J. W. Brill, "Heat Conduction in the Vortex State of NbSe2: Evidence for Multi-Band Superconductivity." Submitted to Phys. Rev. Lett. E-mail eboaknin@physics.utoronto.ca; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211312.

Annette Bussmann-Holder and Antonio Bianconi, "The Tc amplification by quantum interference effects in diborides." Antonio Bianconi's e-mail Antonio.Bianconi@roma1.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211389.

Annette Bussmann-Holder, Roman Micnas, and Alan R. Bishop, "Enhancements of the superconducting transition temperature within the two-band model." E-mail a.bussmann-holder@fkf.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211588.

P. C. Canfield, S. L. Bud'ko, and D. K. Finnemore, "An overview of the basic physical properties of MgB2." To be published in Physica C (in press). Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011; tel. 515 294 6270; fax 515 294 0689; e-mail canfield@ameslab.gov.

A. D. Caplin, Y. Bugoslavsky, L. F. Cohen, L. Cowey, J. Driscoll, J. Moore, and G. K. Perkins, "Critical Fields and Critical Currents in MgB2." BOROMAG Conference, invited paper; to appear in Supercond. Sci. Tech. E-mail a.caplin@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211018.

E. Cappelluti, C. Grimaldi, and L. Pietronero, "Spin susceptibility in small Fermi energy systems: effects of nonmagnetic impurities." To appear in Eur. Phys. J. B. E-mail emmcapp@pil.phys.uniroma1.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211481.

A. Carrington and F. Manzano, "Magnetic penetration depth of MgB2." To be published in Physica C (in press). H. H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK; tel. 44 117 928 8713; fax 44 117 925 5624; e-mail a.carrington@bristol.ac.uk.

R. J. Cava, H. W. Zandbergen, and K. Inumaru, "The substitutional chemistry of MgB2." To be published in Physica C (in press). Department of Chemistry, Princeton Materials Institute, Princeton University, Princeton, NJ 08540, tel. 609 258 0016; fax 609 258 6746; e-mail rcava@princeton.edu. Key words: magnesium aluminum boride, crystal structure, electron microscopy, magnesium diboride substitutions. 74.62.Bf; 74.62.Dh; 74.70.Ad.

J. R. Cooper, A. Carrington, P. J. Meeson, E. A. Yelland, N. E. Hussey, L. Balicas, S. Tajima, S. Lee, S. M. Kazakov, and J. Karpinski, "de Haas-van Alphen effect in MgB2 crystals." To be published in Physica C (in press). Contact A. Carrington, H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK; tel. 44 117 928 8713; fax 44 117 925 5624; e-mail a.carrington@bristol.ac.uk.

Yu. Eltsev, "Resistive behavior and magnetic phase diagram of MgB2 single crystals." To be published in Physica C (in press). Department of Condensed Matter Physics, Solid State Physics, 16440 Stockholm, Kista, Sweden; tel. 46 8 790 4182; fax 46 8 752 7850; e-mail yuri@pollux.imit.kth.se. Key words: MgB2, single crystal, upper critical field, anisotropy. 74.25.Fy; 74.70.Ad; 74.60.Ec.

B. Fisher, K. B. Chashka, L. Patlagan, and G. M. Reisner, "Electronic transport in MgB2, AlB2 and ZrB2--a comparative study." To be published in Physica C (in press). Physics Department and Crown Center for Superconductivity, Technion Haifa 32000, Israel; tel. 972 4 8293652; fax 972 4 8221514; e-mail phr06bf@physics.technion.ac.il. Key words: superconductivity, thermopower, weak localization, density of states. 74.70.Ad; 72.15.Jf; 72.15.Rn; 71.20.Gj.

R. A. Fisher, Guangtao Li, J. C. Lashley, F. Bouquet, N. E. Phillips, D. G. Hinks, J. D. Jorgensen, and G. W. Crabtree, "Specific heat of Mg{11}B2." To be published in Physica C (in press). Contact N. E. Phillips, Department of Chemistry, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720; tel. 510 642 4855; fax 510 642 2835. Key words: MgB2, superconductivity, specific heat, two gaps, phenomenological fit. 74.25.Bt; 74.60.Ec; 75.40.Cx.

R. Flukiger, H. L. Suo, N. Musolino, C. Beneduce, P. Toulemonde, and P. Lezza, "Superconducting properties of MgB2 tapes and wires." To be published in Physica C (in press). Departement de Physique de la Matiere Condensee, Universite de Geneve, 24 Quai Ernest-Ansermet, CH-1211 Geneve 4, Switzerland; tel. 41 22 702 6240; fax 41 22 702 6869; e-mail rene.flukiger@physics.unige.ch. Key words: MgB2 superconductors, fabrication of wires and tapes, critical current densities, upper critical and irreversibility fields, crystalline and electronic anisotropy. 74.70.Ad; 74.60.Ec.

Wilfried Goldacker, Sonja I. Schlachter, Johann Reiner, Silke Zimmer, Arman Nyilas, and Helmut Kiesel, "Mechanical properties of reinforced MgB2 wires." Accepted for publication in IEEE Transactions on Applied Supercond. (proceedings of ASC 2002 Conference, Houston, Texas, August 2002). Sonja I. Schlachter's e-mail sonja.schlachter@itp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211617.

A. F. Goncharov and V. V. Struzhkin, "Pressure dependence of the Raman spectrum, lattice parameters and superconducting critical temperature of MgB2: evidence for pressure-driven phonon-assisted electronic topological transition." To be published in Physica C (in press). Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015; tel. 202 478 8952; fax 202 478 8901; e-mail struzhkin@gl.ciw.edu. Key words: Raman, pressure, superconductivity.

S. K. Gupta, Shashwati Sen, Niraj Joshi, D. K. Aswal, I. K. Gopalakrishnan, J. V. Yakhmi, V. C. Sahni, Eun-Mi Choi, Kijoon H. P. Kim, Hyun-Sook Lee, Hyun Jung Kim, W. N. Kang, and Sung-Ik Lee, "Effect of Interface Pinning on Dissipation, Volume Pinning Force and Measurement of Upper Critical Magnetic Field in MgB2 Thin Films." To be published in Physica C (in press). Technical Physics & Prototype Engineering Division, BARC, Mumbai 400085, India; tel. 91-22-25593863; fax 91-22-25505151; e-mail drgupta@magnum.barc.ernet.in. Key words: MgB2, Hc2 anisotropy, interface pinning, volume pinning force, critical current density, Ginzburg Landau model. 74.70.Ad, 74.60.Ge, 74.60.Jg, 74.20De.

Y. S. Han, M J. Qin, J. K. F. Yau, H. K. Liu, S. X. Dou, C. M. Lee, and X. Jin, "AC response studying on MgB2 superconductor by the Maley's method." To be published in Physica C (in press). Department of Physics and Center for Advanced Studies in Science and Technology of Microstructures, Nanjing University, Nanjing 210093, China; e-mail vsmlab@nju.edu.cn. Key words: AC susceptibility, flux creep activation energy. 74.60.Ge.

D. G. Hinks and J. D. Jorgensen, "The isotope effect and phonons in MgB2." To be published in Physica C (in press). Materials Science Division, Argonne National Laboratory, Building 223, 9700 S. Cass Avenue, Argonne, IL 60439; tel. 630 252 5471; fax 630 252 7777; e-mail hinks@anl.gov.

M. Iavarone, G. Karapetrov, A. E. Koshelev, W. K. Kwok, G. W. Crabtree, D. G. Hinks, R. Cook, W. N. Kang, E. M. Choi, H. J. Kim, and S. I. Lee, "Directional scanning tunneling spectroscopy in MgB2." To be published in Physica C (in press). Materials Science Division, Argonne National Laboratory, Argonne, IL 60439; e-mail maria@anl.gov. Key words: MgB2, STM, scanning tunneling spectroscopy, multi-gap superconductivity.

J. Karpinski, S. M. Kazakov, J. Jun, M. Angst, R. Puzniak, A. Wisniewski, and P. Bordet, "Single crystal growth of MgB2 and thermodynamics of Mg-B-N system at high pressure." To be published in Physica C (in press). Solid State Physics Laboratory HPF F22, ETH Honggerberg, CH-8093 Zurich, Switzerland; tel. 41 1 633 22 54; fax 41 1 633 10 72; e-mail karpinski@solid.phys.ethz.ch. Key words: crystal growth, MgB2, high pressure. 80.10.-h; 74.70.Ad; 07.35.+k; 74.25.Ha.

Robert F. Klie, Haibin Su, Yimei Zhu, James W. Davenport, Juan-Carlos Idrobo, Nigel D. Browning, and Peter D. Nellist, "Measuring the Hole State Anisotropy in MgB2 by Electron Energy-Loss Spectroscopy." Submitted to PRB. Juan-Carlos Idrobo's e-mail jidrob1@uic.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211295.

V. G. Kogan and S. L. Bud'ko, "Anisotropy parameters of superconducting MgB2." To be published in Physica C (in press). Department of Physics and Astronomy, Ames Laboratory, Iowa State University, Ames, IA 50011; tel. 515 294 3986; fax 515 294 0689; e-mail kogan@ameslab.gov. Key words: magnesium diboride, upper critical field, penetration depth, anisotropy, torque. 74.60.Ec; 74.20.-z; 74.70.Ad.

A. E. Koshelev and A. A. Golubov, "Mixed state of a dirty two-band superconductor: application to MgB2." E-mail koshelev@msd.anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211388.

T. Masui and S. Tajima, "Normal state transport properties of MgB2." To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Tokyo 135 0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5705/5714; e-mail masui@istec.or.jp. Key words: MgB2, resistivity, thermoelectric power, Hall coefficient. 74.70.Ad.

I. I. Mazin and V. P. Antropov, "Electronic structure, electron-phonon coupling, and multiband effects in MgB2." To be published in Physica C (in press). Code 6391, Naval Research Laboratory, 4555 Overlook Avenue, Washington, DC 20375; tel. 202 767 6990; fax 202 404 7546; e-mail mazin@nrl.navy.mil.

Yu. G. Naidyuk, I. K. Yanson, O. E. Kvitnitskaya S. Lee, and S. Tajima, "Search for E2g phonon modes in MgB2 single crystals by point-contact spectroscopy." E-mail NAIDYUK@ilt.kharkov.ua; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211134.

K. Papagelis, J. Arvanitidis, K. Prassides, A. Schenck, T. Takenobu, and Y. Iwasa, "muSR study of carbon-doped MgB2 superconductors." Europhys. Lett., in press. E-mail kpapag@auth.gr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211142.

A. Perucchi, L. Degiorgi, J. Jun, M. Angst, and J. Karpinski, "Far-infrared optical properties of MgB2 single crystals." To be published in Physica C (in press). Laboratorium fur Festkorperphysik, ETH Zurich, CH-8093 Zurich, Switzerland; tel. 41 1 633 22 41; fax 41 1 633 10 72; e-mail degiorgi@solid.phys.ethz.ch. Key words: magneto-optics, superconductivity. 78.20.-e; 74.70.-b.

James William Quilty, "The MgB2 superconducting energy gaps measured by Raman spectroscopy." To be published in Physica C (in press). Department of Complexity Science and Engineering, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan; tel. 81 3 5841 8796; fax 81 3 5841 8864; e-mail quilty@wyvern.phys.s.u-tokyo.ac.jp. Key words: Raman spectroscopy, superconducting gap, magnesium diboride, MgB2. 74.25.Gz; 74.25.Jb; 74.70.Ad; 78.30.Er.

R. A. Ribeiro, S. L. Bud'ko, C. Petrovic, and P. C. Canfield, "Effects of boron purity, Mg stoichiometry and carbon substitution on properties of polycrystalline MgB2." To be published in Physica C (in press). Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011; tel. 515 294 6270; fax 515 294 0689; e-mail ribeiro@ameslab.gov. Key words: MgB2, stoichiometry, transport properties. 74.70.Ad; 74.25.Fy.

P. Samuely, P. Szabo, J. Kacmarcik, T. Klein, and A. G. M. Jansen, "Point-contact spectroscopy of MgB2." E-mail samuely@saske.sk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211544.

I. R. Shein, K. I. Shein, N. I. Medvedeva, and A. L. Ivanovskii, "Effect of metal vacancies on the electronic band structure of hexagonal Nb, Zr and Y diborides." E-mail irshein@mail.ur.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0211247.

H. Uchiyama, S. Tajima, K. M. Shen, D. H. Lu, and Z.-X. Shen, "Photoemission studies in MgB2." To be published in Physica C (in press). Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5705; e-mail uchiyama@istec.or.jp. Key words: MgB2, photoemission spectroscopy. 74.70.Ad; 74.25.Jb; 79.60.Bm.

T. Wu, J. K. F. Yau, Y. M. Cai, Y. G. Cui, D. W. Gu, P. F. Yuan, G. Q. Yuan, L. J. Shen, and X. Jin, "Study of synthesis technology and superconductivity of MgB2." To be published in Physica C (in press). Department of Physics, Department of Material Science, Nanjing University of Technology, Nanjing 210009, China. Key words: superconductivity, MgB2, residual resistance ratio, synthesis. 74.70; 74.25.

G. Q. Yuan, J. K. F. Yau, Y. S. Han, D. W. Lu, X. N. Xu, L. J. Shen, X. Jin, and Y. N. Wang, "Thermally assisted flux flow character of MgB2." To be published in Physica C (in press). Department of Physics and National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, PR China; e-mail jinxin@nju.edu.cn. Key words: effective potential, MgB2, vortex. 74.60.Ge.

G. Q. Yuan, J. K. F. Yau, Y. S. Han, X. N. Xu, D. W. Lu, L. J. Shen, X. Jin, and Y. N. Wang, "Pinning effects and magnetization hysteresis loops in MgB2." To be published in Physica C (in press). Department of Physics and National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, PR China; e-mail jinxin@nju.edu.cn. Key words: effective potential, MgB2, phase region. 74.60.Ge.

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December 2002 Preprints

Jong-Rok Ahn, Soon-Gul Lee, Yunseok Hwang, Gun Yong Sung, and Do Kyung Kim, "Fabrication of MgB2 thin film by rf magnetron sputtering." To be published in Physica C (in press). Contact Soon-Gul Lee, fax 82 41 865 0939; e-mail sglee@korea.ac.kr. Key words: MgB2 thin film, superconducting, sputtering.

Toshiyuki Atsumi, Mitsuyuki Tsuji, Mingxiang Xu, Hideaki Kitazawa, and Takekazu Ishida, "Temperature dependence of magnetic torque for a single crystal MgB2 in 10 kG." To be published in Physica C (in press). Contact Takekazu Ishida, Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; e-mail ishida@center.osakafu-u.ac.jp. Key words: torque, anisotropy, MgB2, refrigerator.

F. Bouquet, R. A. Fisher, N. E. Phillips, D. G. Hinks, and J. D. Jorgensen, "Specific heat of Mg11B2: evidence for two energy gaps." To be published in Physica C (in press). Contact N. E. Phillips, Department of Chemistry, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720; tel. 510 642 4855; fax 510 642 2835; e-mail nephill@cchem.berkeley.edu. Key words: specific heat, superconductivity, Mg11B2, two energy gaps, phenomenological fit.

Hyoung Joon Choi, Marvin L. Cohen, and Steven G. Louie, "Anisotropic Eliashberg theory of MgB2: Tc, isotope effects, superconducting energy gaps, quasiparticles, and specific heat." To be published in Physica C (in press). Contact Steven G. Louie, Department of Physics, University of California at Berkeley, 366 LeConte Hall 7300, Berkeley, CA 94720-7300; tel. 510 642 1709; fax 510 643 9473; e-mail sglouie@uclink.berkeley.edu. Key words: MgB2, electron-phonon interaction, Eliashberg equation. 74.25.Jb; 74.25.B; 71.15.H.

T. Dahm and N. Schopohl, "Influence of Fermi surface topology on the upper critical field in two-band superconductors--application to MgB2." E-mail dahm@uni-tuebingen.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212188.

D. K. Finnemore, W. E. Straszheim, S. L. Bud'ko, P. C. Canfield, N. E. Anderson Jr., and R. J. Suplinskas, "CVD routes to MgB2 conductors." To be published in Physica C (in press). Ames Laboratory, US Department of Energy and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011; tel. 515 294 3455; fax 515 294 0689; e-mail finnemor@ameslab.gov. 74.25.Bt; 74.25.Fy; 74.25.Ha.

Tae-Hyoung Gimm and Han-Yong Choi, "Self-energy analysis of frequency-dependent conductivity: Application to Pb, Nb, and MgB2 in normal state." Submitted to Phys. Rev. B. E-mail thgim@phys1.skku.ac.kr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212361.

A. Gurevich, "Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors." E-mail agourevi@facstaff.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212129.

N. Hakim, C. Kusko, S. Sridhar, A. Soukiassian, X. H. Zeng, and X. X. Xi, "The superconducting gap of \QTR{em}{in situ} MgB2 thin films by microwave surface impedance measurements." Appl. Phys. Lett., 81, 3603 (2002). E-mail hakim.n@neu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212009.

T. W. Heitmann, S. D. Bu, D. M. Kim, J. H. Choi, J. Giencke, C. B. Eom, K. A. Regan, N. Rogado, M. A. Hayward, T. He, J. S. Slusky, P. Khalifah, M. Haas, R. J. Cava, D. C. Larbalestier, and M. S. Rzchowski, "MgB2 Energy Gap Determination by Scanning Tunneling Spectroscopy." E-mail twheitmann@students.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212194.

M. Jourdan, N. Bluemer, and H. Adrian, "Superconductivity of SrTiO{3-delta}." N. Bluemer's e-mail nils.bluemer@uni-mainz.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212649.

A. Junod, Y. Wang, F. Bouquet, I. Sheikin, P. Toulemonde, M. R. Eskildsen, M. Eisterer, H. W. Weber, S. Lee, and S. Tajima, "Specific heat of ceramic and single crystal MgB2." To be published in Physica C (in press). Section de Physique, Universite de Geneva, 24 quai E.-Ansermet, CH-1211 Geneve 4, Switzerland; e-mail alain.junod@physics.unige.ch. Key words: MgB2, specific heat, single crystal, irradiation.

Milind N. Kunchur, Sung-Ik Lee, and W. N. Kang, "The pair-breaking critical current density of magnesium diboride." Submitted to Phys. Rev. Lett. Related preprints/reprints by our group can be found on http://www.physics.sc.edu/kunchur; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212108. Key words: pair, breaking, depairing, superconductor, superconductivity, flux, fluxon, vortex, MgB2.

Sergey Lee, "Crystal growth of MgB2." To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5717; e-mail lee@istec.or.jp. Key words: MgB2, single crystals, high pressure, flux growth, encapsulation. 74.70.Ad; 81.10.h; 07.35.+k.

X. Z. Liao, A. Serquis, Y. T. Zhu, J. Y. Huang, L. Civale, D. E. Peterson, F. M. Mueller, and H. F. Xu, "Mg(B,O)2 precipitation in MgB2." To be published in J. Applied Physics. A. Serquis' e-mail aserquis@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212571.

H. Luo, J. W. Lin, X. Leng, Y. Liu, L. Qiu, and S. Y. Ding, "Determination of critical current density in flux creep state for MgB2." To be published in Physica C (in press). Contact S. Y. Ding, Department of Physics, National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, PR China; e-mail syding@netra.nju.edu.cn. Key words: jc, flux creep state, AC susceptibility.

Y. Matsumoto, I. Shigeta, T. Abiru, Y. Terasaki, T. Akune, and N. Sakamoto, "Critical current density and flux pinning characteristics of powdered MgB2 specimens." To be published in Physica C (in press). Department of Electrical Engineering, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan; tel. 81 92 871 6631; fax 81 92 871 7667; e-mail matumoto@fukuoka-u.ac.jp. Key words: MgB2, magnetization, critical current density, flux pinning.

I. I. Mazin, O. K. Andersen, O. Jepsen, A. A. Golubov, O. V. Dolgov, and J. Kortus, "Comment on 'First-principles calculation of the superconducting transition in MgB2 within the anisotropic Eliashberg formalism'." O. Jepsen's e-mail jepsen@fkf.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212417.

Zon Mori, Koji Eitoku, Toshiya Doi, Shin-ichiro Koba, and Yoshinori Hakuraku, "MgB2 thin film fabrication by rf magnetron sputtering." To be published in Physica C (in press). Yatsushiro National College of Technology, 2627 Hirayama-Shinmati, Yatsushiro, Kumamoto 866-8501, Japan; tel. 81 965 351611; fax 81 965 330616; e-mail mori@as.yatsushiro-nct.ac.jp. Key words: MgB2 thin film, rf magnetron sputtering, oxidation of Mg.

V. F. Nesterenko and Y. Gu, "Elastic properties of hot isostatically pressed magnesium diboride." E-mail vnestere@mechanics.ucsd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212585.

Vitali F. Nesterenko, "Bulk Magnesium Diboride, Mechanical and Superconducting Properties." Invited talk at Eleventh International Symposium on Processing and Fabrication of Advanced Materials, ASM Materials Solutions, 2002, October 7-10, Columbus, Ohio; Conference Proceedings, in press. E-mail vnestere@mechanics.ucsd.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212543.

Kazuki Ohishi, Takahiro Muranaka, Jun Akimitsu, Akihiro Koda, Wataru Higemoto, and Ryosuke Kadono, "Quasiparticle Excitations outside the Vortex Cores in MgB2 Probed by Muon Spin Rotation." To be published in J. Phys. Soc. Jpn. E-mail kazuki.ohishi@kek.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212022.

Nianhua Peng, G. Shao, C. Jeynes, R. P. Webb, R. M. Gwilliam, G. Boudreault, D. M. Astill, and W. Y. Liang, "Ion-Beam Synthesis of Superconducting MgB2 Thin Films." Submitted to Applied Physics Letters. Advanced Technology Institute, School of Electronics and Physical Sciences, University of Surrey, Guildford GU2 7XH, UK; e-mail ees1np@eim.surrey.ac.uk. Key words: Ion-beam synthesis, MgB2, thin film. 74.70.

James W. Quilty, Sergey Lee, Ayako Yamamoto, Setsuko Tajima, and Akio Yamanaka, "A Raman scattering study of superconductivity in MgB2." To be published in Physica C (in press). Department of Complexity Science and Engineering, Tokyo University, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan; tel. 81 3 5841 8796; fax 81 3 5841 8864; e-mail quilty@wyvern.phys.s.u-tokyo.ac.jp. Key words: Raman spectroscopy, superconducting gap, MgB2.

D. V. Shantsev, P. E. Goa, F. L. Barkov, T. H. Johansen, W. N. Kang, and S. I. Lee, "Interplay of dendritic avalanches and gradual flux penetration in superconducting MgB2 films." Submitted to Supercond. Sci. Technol. E-mail daniel.shantsev@fys.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212404.

I. R. Shein, N. I. Medvedeva, and A. L. Ivanovskii, "Band structure of new superconducting AlB2-like ternary silicides M(Al{0.5}Si{0.5})2 and M(Ga{0.5}Si{0.5})2 (M= Ca, Sr and Ba)." E-mail irshein@mail.ur.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212047.

Qingfei Shen, Xu Xie, Guohua Zhang, Qingrong Feng, Xiaolin Xu, Chunguang Li, Zhengxiang Gao, Sheng Luo, Yusheng He, and Duo Jin, "Electric transport study of superconducting MgB2 wire." To be published in Physica C (in press). Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; e-mail qfshen@cl.cryo.ac.cn. Key words: V-I characteristics, MgB2 wire, pulse current method.

E. Silva, R. Marcon, R. Fastampa, M. Giura, and S. Sarti, "DC and microwave fluctuational conductivity of anisotropic superconductors." To be published in Physica C (in press). Dip. Di Fisica "E. Amaldi" and Unita INFM, Universita Rome Tre, Via della Vasca Navale 84, Rome 00146, Italy; e-mail silva@fis.uniroma3.it. Key words: fluctuations, paraconductivity, cuprates, MgB2.

M. Sinder and J. Pelleg, "Preparation of the Silver Boride: Preliminary Results." Ben-Gurion University of the Negev, Beer Sheva, Israel; e-mail micha@bgumail.bgu.ac.il; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212632.

Prabhakar P. Singh, "Acoustical-Mode-Driven Electron-Phonon Coupling in Transition-Metal Diborides." E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212443.

A. V. Sologubenko, J. Jun, S. M. Kazakov, J. Karpinski, and H. R. Ott, "Anomalous low-temperature thermal conductivity of MgB2." To be published in Physica C (in press). Laboratorium fur Festkorperphysik, ETH Honggerberg, CH-8093 Zurich, Switzerland; fax 41 1 633 10 77; e-mail sologubenko@solid.phys.ethz.ch. Key words: MgB2, superconductivity, thermal conductivity, mixed state.

P. Szabo, P. Samuely, J. Kacmarcik, T. Klein, J. Marcus, and A. G. M. Jansen, "Point-contact spectroscopy of MgB2 in high magnetic fields." To be published in Physica C (in press). Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, SK-043 53 Kosice, Slovakia; e-mail pszabo@saske.sk. Key words: point-contact spectroscopy, MgB2, two-band superconductivity, electron-phonon interaction.

Setsuko Tajima, Takahiko Masui, James Quilty, Sergey Lee, Ayako Yamamoto, and Ako Yamanaka, "Experimental study of electron-phonon interaction in MgB2." To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, Shinome 1-10-13, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 5708; fax 81 3 3536 5708; e-mail tajima@istec.or.jp. Key words: MgB2, electron-phonon coupling, Raman scattering, two gaps.

Ken'ichi Takahashi, Mingxiang Xu, Hideaki Kitazawa, and Takekazu Ishida, "Evidence for superconductivity in the boron layers of MgB2." To be published in Physica C (in press). Contact Takekazu Ishida, Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; e-mail ishida@center.osakafu-u.ac.jp. Key words: torque, anisotropy, MgB2, layered superconductor.

T. Takasaki, T. Ekino, T. Muranaka, H. Fujii, and J. Akimitsu, "Multiple-gap structure of the binary superconductor MgB2." To be published in Physica C (in press). Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan; e-mail takasaki@hiroshima-u.ac.jp. Key words: tunneling spectroscopy, multiple-gap structure, break junction, MgB2.

L. Tewordt and D. Fay, "Specific heat and thermal conductivity in the vortex state of the two-gap superconductor MgB2." Submitted to Phys. Rev. B. D. Fay's e-mail fay@physnet.uni-hamburg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212503.

L. Ya. Vinnikov, J. Karpinski, S. M. Kazakov, J. Jun, J. Anderegg, S. L. Bud'ko, and P. C. Canfield, "Bitter decoration of vortex structure in MgB2 single crystals." To be published in Physica C (in press). Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region 142432, Russia; fax 7 96 576 4111; e-mail vinnik@issp1.issp.ac.ru. 74.60.Ge; 74.70.Ad.

L. M. Volkova, S. A. Polyshchuk, S. A. Magarill, and F. E. Herbeck, "Crystal Chemical Concept of Arrangement and Function of Layered Superconducting Materials." E-mail volkova@ich.dvo.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212625.

U. Welp, A. Rydh, G. Karapetrov, W. K. Kwok, G. W. Crabtree, C. Marcenat, L. M. Paulius, L. Lyard, T. Klein, J. Marcus, S. Blanchard, P. Samuely, P. Szabo, A. G. M. Jansen, K. H. P. Kim, C. U. Jung, H.-S. Lee, B. Kang, and S.-I. Lee, "Superconducting phase diagram of single-crystal MgB2." To be published in Physica C (in press). Materials Science Division, Argonne National Laboratory, Argonne, IL 60439; e-mail welp@anl.gov.

Hengyi Xu, Xiaoming Zhu, and Daole Yin, "Nonlinear material equation and its application in MgB2." To be published in Physica C (in press). Department of Physics, Peking University, Box 26, 140, Beijing 100871, China; tel. 86 10 6275 9879; fax 86 10 6275 1615; e-mail xmzhu@ufp.nju.edu.cn. Key words: nonlinear material equation, longitudinal resistivity, Hall resistivity, pinning. 74.60.Ge; 74.25.Fy; 72.15.Gd.

T. R. Yang, G. Ilonca, A. V. Pop, R. Stiufiuc, and O. Furdui, "Superconductivity of MgB2 wires." To be published in Physica C (in press). Department of Physics, National Taiwan Normal university, No 88 Sec.4 Tingchou Road, Taipei 117, Taiwan, ROC; tel. 886 2 2934 6620; fax 886 2 2933 5075; e-mail yang1@scc.ntnu.edu.tw.

I. K. Yanson, Yu. G. Naidyuk, O. E. Kvitnitskaya, V. V. Fisun, N. L. Bobrov, P. N. Chubov, V. V. Ryabovol, G. Behr, W. N. Kang, E.-M. Choi, H.-J. Kim, S.-I. Lee, T. Aizawa, S. Otani, and S.-L. Drechsler, "Study of the electron-phonon interaction in metal diborides MeB2 (Me=Zr, Nb, Ta, Mg) by point-contact spectroscopy." Proceedings of conference, "Modern Problems in Superconductivity", Sept. 2002, Yalta, Ukraine. Yu. G. Naidyuk's e-mail naidyuk@ilt.kharkov.ua; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212599.

S. Yata, G. Shimizu, Y. Yamada, S. Kubo, and A. Matsushita, "Superconducting properties of B on Mg bilayer films sequentially deposited at low substrate temperatures." To be published in Physica C (in press). Department of Materials Science, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan; e-mail s029118@matsu.shimane-u.ac.jp. Key words: MgB2 superconductor, thin film, sequential deposition, low temperature synthesis.

Jaejun Yu, Young Woo Son, and Jisoon Ihm, "Dynamic Jahn-Teller effect and superconductivity in MgB2." To be published in Physica C (in press). School of Physics and Center for Strongly Correlated Materials Research, Seoul National University, Seoul 151-747, South Korea; e-mail jyu@phya.snu.ac.kr. Key words: superconductivity, MgB2, multiple order-parameters, Jahn-Teller effect.

Y. Z. Zhang, R. Deltour, H. H. Wen, and Z. X. Zhao, "Observation of quantum effects of vortices in MgB2 superconductors." To be published in Physica C (in press). National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100080, China; e-mail usersc8@aphy.iphy.ac.cn. Key words: quantum effects, vortex matter, MgB2.

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January 2003 Preprints

Jun Akimitsu and Takahiro Muranaka, "Superconductivity in MgB2." To be published in Physica C (in press). Department of Physics, Aoyama-Gakuin University, Setagaya-ku, Tokyo 157-8572, Japan; e-mail jun@soliton.phys.aoyama.ac.jp. Key words: superconductivity, boride compounds, MgB2, electron-phonon interaction.

Tadahiro Akune, Hiroyuki Abe, Nobuyoshi Sakamoto, and Yasukuni Matsumoto, "Magnetization and irreversibility field in powdered MgB2 superconductor." To be published in Physica C (in press). Department of Electrical Engineering, Kyushu Sangyo University, 2-3-1 Matsukadai, 813-8503 Fukuoka, Japan; e-mail akune@te.kyusan-u.ac.jp. Key words: MgB2, magnetization, AC susceptibility.

M. Avdeev, J. D. Jorgensen, R. A. Ribeiro, S. L. Bud'ko, and P. C. Canfield, "Crystal Chemistry of Carbon-Substituted MgB2." J. D. Jorgensen's e-mail jjorgensen@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0301025.

J. J. Betouras, V. A. Ivanov, and F. M. Peeters, "Ginzburg-Landau theory and effects of pressure on a two-band superconductor : application to MgB2." E-mail betouras@uia.ua.ac.be; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0301491.

Noriko Chikumoto, Ayako Yamamoto, Marcin Konczykowski, and Masato Murakami, "Effect of heavy-ion irradiation on the pinning properties of MgB2." To be published in Physica C (in press). Superconductivity Research Laboratory, Tamachi Laboratory, Division 3, ISTEC, 1-16-25 Shibaura, Minato-ku, Tokyo 105-0023, Japan; tel. 81 3 3454 9284; fax 81 3 3454 9287; e-mail chiku@istec.or.jp. Key words: MgB2, heavy-ion irradiation, critical current density, flux creep.

Daniele Di Gioacchino, Paolo Tripodi, and Umberto Gambardella, "Third harmonic ac susceptibility measurements on MgB2 bulk: irreversibility line and frequency dynamic behavior." To be published in Physica C (in press). I. N. F. N., Frascati National Laboratory, via Enrico Fermi 40, 00044 Frascati, Italy; e-mail daniele.digioacchino@lnf.infn.it. Key words: MgB2, irreversibility line, dynamic transport.

O. V. Dolgov, R. S. Gonnelli, G. A. Ummarino, A. A. Golubov, S. V. Shulga, and J. Kortus, "Can one extract the electron-phonon-interaction from tunneling data in case of the multigap superconductor MgB2?" Submitted to Phys. Rev. B (Brief Reports). E-mail o.dolgov@fkf.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0301542.

M. R. Eskildsen, M. Kugler, G. Levy, S. Tanaka, J. Jun, S. M. Kazakov, J. Karpinski, and O. Fischer, "Vortex lattice imaging in single crystal MgB2 by scanning tunneling spectroscopy." To be published in Physica C (in press). Departement de Physique de la Matiere Condensee, Universite de Geneve, 24 Quai E.-Ansermet, CH-1211, Geneve 4, Switzerland; tel. 41 22 702 6499; fax 41 22 702 6869; e-mail morten.eskildsen@physics.unige.ch. Key words: MgB2, STS, vortex.

J. P. Franck, J. Jung, and M. Abdelhadi, "Persistent supercurrents in MgB2." To be published in Physica C (in press). Department of Physics, University of Alberta, Edmonton AB, Canada T6G 2J1; e-mail franck@phys.ualberta.ca. Key words: MgB2, persistent current, magnetization, magnetic relaxation.

Ajay Kumar Ghosh, Hitomi Nakamura, Masashi Tokunaga, and Tsuyoshi Tamegai, "Superconductivity in Y2PdGe3-xSix: interplay between Debye temperature and coupling constant." To be published in Physica C (in press). Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan; e-mail ajay@ap6.t.u-tokyo.ac.jp. Key words: germanide superconductors, critical temperature, magnetisation, specific heat.

B. A. Glowacki, M. Majoros, M. Eisterer, S. Toenies, H. W. Weber, M. Fukutomi, K. Komori, and K. Togano, "MgB2 superconductors for applications." To be published in Physica C (in press). Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK; tel. 44 1223 331 738; fax 44 1223 334 373; e-mail bag10@cam.ac.uk. Key words: MgB2, coated conductors, composites, ac losses.

G. Karapetrov, M. Iavarone, A. E. Koshelev, W. K. Kwok, G. W. Crabtree, D. G. Hinks, and S. I. Lee, "Momentum-dependent scanning tunneling spectroscopy in MgB2." To be published in Physica C (in press). Materials Science Division, Argonne National Laboratory, Argonne, IL 60439; tel. 630 252 5668; fax 630 252 7777; e-mail goran@anl.gov. Key words: MgB2, STM, scanning tunneling spectroscopy, multi-gap superconductivity.

D. C. Kim, J. S. Kim, B. H. Kim, Y. W. Park, C. U. Jung, and S. I. Lee, "Thermoelectric power of MgB2." To be published in Physica C (in press). Contact Y. W. Park, Department of Physics, School of Physics and Condensed Matter Research Institute, Seoul National University, Seoul 151-747, South Korea; tel. 82 2 880 6607; fax 82 2 873 7037; e-mail ywpark@phya.snu.ac.kr. Key words: MgB2, thermoelectric power, bismuthates, electron-phonon coupling. 74.25.Fy; 74.70.-b; 74.72.Jt.

R. F. Klie, Y. Zhu, G. Schneider and J. Tafto, "Experimental probing of the anisotropy of the empty p states near the Fermi level in MgB2." E-mail klie@bnl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0301575.

Kazuaki Kobayashi and Masao Arai, "LiBC and related compounds under high pressure." To be published in Physica C (in press). Computational Materials Science Center, National Institute for Materials Science, RCCNM, Namiki 1-1, Tsukuba-shi, Ibaraki 305-0044, Japan; fax 81 298 52 7449; e-mail kobayashi.kazuaki@nims.go.jp. Key words: LiBC, lattice anomaly, high pressure, first principles calculation.

C. P. Moca and B. Janko, "Theory of strong electron-phonon superconductivity for MgB2 in the framework of two-band model." To be published in Physica C (in press). Contact B. Janko, Materials Science Division, Argonne National Laboratory, Argonne, IL 60439; e-mail bjanko@nd.edu. Key words: MgB2, two-band model, Eliashberg theory, superconductivity.

Masao Nakao, "Bonding nature and wave function around the Fermi level of MgB2-related compounds." To be published in Physica C (in press). Department of Precision Engineering, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan; e-mail mnakao@keyaki.cc.u-tokai.ac.jp. Key words: diborides, electronic structure, molecular orbitals, Madelung potential.

W. E. Pickett, J. M. An, H. Rosner, and S. Y. Savrasov, "Role of two dimensionality in MgB2." To be published in Physica C (in press). Department of Physics, University of California, Davis, CA 95616; tel. 530 752 0926; fax 530 752 4717; e-mail pickett@physics.ucdavis.edu. Key words: superconductivity, MgB2, two-dimensionality, electron-phonon coupling.

K. Przybylski, L. Stobierski, J. Chmist, and A. Kolodziejczyk, "Synthesis and properties of MgB2 obtained by SHS method." To be published in Physica C (in press). Faculty of Materials Science and Ceramics, Department of Solid State Chemistry, University of Mining and Metallurgy (AGH), Aleja Mickiewicza 30, 30-059 Krakow, Poland; tel. 48 12 617 2469; fax 48 12 633 1593; e-mail kaz@uci.agh.edu.pl. Key words: MgB2, SHS method, microstructure.

M. Schneider, A. Gladun, D. Lipp, A. Handstein, H. Vinzelberg, S.-L. Drechsler, K.-H. Muller, and A. T. Burkov, "Thermoelectric power of hot deformed MgB2." To be published in Physica C (in press). Institut fur Tieftemperaturphysik, Technische Universitat Dresden, D-01062 Dresden, Germany; fax 49 351 463 37060; e-mail schneid@physik.phy.tu-dresden.de. Key words: thermopower, electrical resistivity, MgB2.

Carmine Senatore, Massimiliano Polichetti, Danilo Zola, Tiziana Di Matteo, Giovanni Giunchi, and Sandro Pace, "Harmonic susceptibilities and pinning properties of MgB2 bulk superconductors." To be published in Physica C (in press). Dipartimento di Fisica, Universita' degli Studi di Salerno and INFM, Via S. Allende, Baronissi (SA), I-84081, Italy; tel. 39 89 965 289; fax 39 89 953 804; e-mail carmelo@sa.infn.it. Key words: AC susceptibility, MgB2, flux dynamics.

Zhixiang Shi, Aswini K. Pradhan, Masashi Tokunaga, Tsuyoshi Tamegai, Yoshihiko Takano, Kazumasa Togano, Hijiri Kito, and Hideo Ihara, "Comparative study on the anisotropic properties of MgB2." To be published in Physica C (in press). Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; tel. 81 3 5841 6863; fax 81 3 5841 6848; e-mail shi@ap6.t.u-tokyo.ac.jp. Key words: MgB2, anisotropy, upper critical field.

Hideaki Takano, Akihiro Kanno, Michio Takahashi, and Shigeyuki Murayama, "Mechanical milling of MgB2." To be published in Physica C (in press). Department of Materials Science and Engineering, Muroran Institute of Technology, 27-1 Mizumoto-Cho, Muroran, Hokkaido 050-8585, Japan; tel. 81 143 46 5617; fax 81 143 46 5625; e-mail takano@mmm.muroran-it.ac.jp. Key words: MgB2, mechanical milling, x-ray diffraction, magnetization.

Mingxiang Xu, Yoshihiko Takano, Takeshi Hatano, Masayo Kitahara, and Daisuke Fujita, "The fabrication of MgB2 superconducting STM tips." To be published in Physica C (in press). Nanomaterials Laboratory, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; tel. 81 298 59 2831; fax 81 298 59 2801; e-mail xu.mingxiang@nims.go.jp. Key words: MgB2, STM, Au(111) surface.

Kenji Yoshii and Hideki Abe, "Electrochemical synthesis of superconductive MgB2 from molten salts." To be published in Physica C (in press). Japan Atomic Energy Research Institute, Synchrotron Radiation Research Centre, Mikazuki, Hyogo 679-5148, Japan; tel. 81 791 58 2637; fax 81 791 58 2740; e-mail yoshiike@spring8.or.jp. Key words: MgB2, superconductivity, electrochemical synthesis, molten salts.

M. Zehetmayer, M. Eisterer, H. W. Weber, J. Jun, S. M. Kazakov, and J. Karpinski, "Reversible and irreversible properties of superconducting MgB2." To be published in Physica C (in press). Contact H. W. Weber, Atominstitut der Osterreichischen Universitaten, Stadionalle 2, Vienna A-1020, Austria; tel. 43 1 58801 14140; fax 43 1 58801 14199; e-mail weber@ati.ac.at. Key words: MgB2, single crystal, neutron irradiation, fishtail.

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February 2003 Preprints

M. Acquarone and L. Romano, "Effective inter-band coupling in MgB2 due to anharmonic phonons." L. Romano's e-mail romano@fis.unipr.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302303.

N. E. Anderson, Jr., W. E. Straszheim, S. L. Bud'ko, P. C. Canfield, D. K. Finnemore, and R. J. Suplinskas, "Titanium additions to MgB2 conductors." D. K. Finnemore's e-mail finnemor@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302245.

C. H. Cheng, H. Zhang, Y. Zhao, Y. Feng, X. F. Rui, P. Munroe, H. M. Zeng, N. Koshizuka, and M. Murakami, "Doping Effect of Nano-Diamond on Superconductivity and Flux Pinning in MgB2." Y. Zhao's e-mail y.zhao@unsw.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302202.

C. H. Cheng, Y. Zhao, T. Machi, N. Koshizuka, and M. Murakami, "Time evolution of superconducting properties of MgB2 exposed to water." To be published in Physica C (in press). Contact Y. Zhao, Superconductivity Research Group, School of Materials Science and Engineering, University of New South Wales, PO Box 1, Sydney, NSW 2032, Australia; tel. 61 2 9385 5986; fax 61 2 9385 5956; e-mail y.zhao@unsw.edu.au. Key words: MgB2, superconducting properties, Ti-doping, chemical stability. 74.25.Ha; 74.60.Jg; 74.74.Dd.

R. Heid, B. Renker, H. Schober, P. Adelmann, D. Ernst, and K.-P. Bohnen, "Lattice dynamics and electron-phonon coupling in transition metal diborides." B. Renker's e-mail renker@ifp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302411.

P. Kovac, M. Dhalle, T. Melisek, H. J. N. van Eck, W. A. J. Wessel, B. ten Haken, and I. Husek, "Dependence of the Critical Current in Ex-situ Multi- and Mono-filamentary MgB2/Fe Wires on Axial Tension and Compression." To be published in Superconductor Science and Technology. Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 841 04 Bratislava, Slovak Republic; tel (421 2) 5477 5823-2841; fax (421 2) 5477 5816; e-mail: elekkova@savba.sk; www.elu.sav.sk. Key words: MgB2/Fe wires, critical current degradation, tensile and compressive axial strain, reversible strain, pre-compression. 74.70.Lp, 81.40.Rs.

M. J. Kramer, S. L. Bud'ko, P. C. Canfield, R. H. T. Wilke, D. K. Finnemore, and R. J. Suplinskas, "Intra-granular Ti precipitates in MgB2." Applied Physics Letters (submitted). D. K. Finnemore's e-mail finnemor@ameslab.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302443.

H. Luo, Y. Liu, X. Leng, L. Qiu, H. M. Luo, Z. H. Wang, and S. Y. Ding, "Flux motion in new superconductor MgB2." To be published in Physica C (in press). Contact S. Y. Ding, National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, PR China; tel. 2 86 25 3593661; fax 2 86 25 3595535; e-mail syding@netra.nju.edu.cn. Key words: MgB2, flux motion, upper critical field. 74.60.Ge.

M. B. Maple, B. J. Taylor, Shi Li, N. A. Frederick, V. F. Nesterenko, and S. S. Indrakanti, "Vortex- and Bragg-glass phases in bulk MgB2." To be published in Physica C (in press). Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093; tel. 858 534 3969; fax 858 534 1241; e-mail mbmaple@ucsd.edu. Key words: MgB2, scaling, vortex-glass, Bragg-glass.

T. M. Mishonov, L. A. Atanasova, T. I. Ivanov, and E. S. Penev, "Temperature dependence of the specific heat for anisotropic-gap BCS superconductors." E-mail mishonov@phys.uni-sofia.bg; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0212491.

A. Morawski, T. Lada, and K. Przybylski, "High gas pressure treatments of MgB2 material." To be published in Physica C (in press). High Pressure Research Center "Unipress" of the Polish Academy of Sciences, Ulica Sokolowska 29/37, 01-142 Warszawa, Poland; tel. 48 22 837 4207; fax 48 22 632 4218; e-mail amor@unipress.waw.pl. Key words: MgB2, high gas pressure synthesis, crystallization, microstructure.

Alexey V. Pan, Sihai Zhou, Huakun Liu, and Shixue Dou, "Properties of superconducting MgB2 wires: 'in-situ' versus 'ex-situ' reaction technique." To be published in Supercond. Sci. Technol. (2003), in press. E-mail pan@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302249.

B. Renker, H. Schober, P. Adelmann, P. Schweiss, K.-P. Bohnen, and R. Heid, "LiBC--A prevented superconductor." E-mail renker@ifp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302036.

J. M. Rowell, S. Y. Xu, X. H. Zeng, A. V. Pogrebnyakov, Q. Li, X. X. Xi, J. M. Redwing, W. Tian, and X. Pan, "Critical Current Density and Resistivity of MgB2 Films." A. V. Pogrebnyakov's e-mail avp11@psu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302017.

T. Schneider, "Thermodynamic relevance of nanoscale inhomogeneities in Bi2Sr2CaCu2O8+delta." E-mail tschnei@physik-rzu.unizh.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302024.

F. Simon, A. Janossy, T. Feher, F. Muranyi, S. Garaj, L. Forro, C. Petrovic, S. Bud'ko, R. A. Ribeiro, and P. C. Canfield, "Magnetic Field Induced Density of States in Superconducting MgB{2}: Measurement of Conduction Electron Spin-Susceptibility." E-mail simon@esr1.fkf.bme.hu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302620.

Prabhakar P. Singh, "Theoretical Study of Electron-Phonon Interaction in ZrB2 and TaB2." E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302155.

S. Soltanian, J. Horvat, X. L. Wang, P. Munroe, and S. X. Dou, "Effect of nano-carbon particle doping on the flux pinning properties of MgB2 superconductor." E-mail ss27@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302530.

M. Xu, Z. Xiao, Y. Takano, T. Hatano, T. Kimura, and D. Fujita, "Compositional analysis of the MgB2 surface using AES." To be published in Physica C (in press). Nanomaterials Laboratory, National Institute for Materials Science, 1-2-1 Sengen, Ibaraki, Tsukuba 305-0047, Japan; tel. 81 298 59 2831; fax 81 298 59 2801; e-mail xu.mingxiang@nims.go.jp. Key words: magnesium diboride, surface, Auger electron spectroscopy, depth profiling. 74.70.Ad; 82.80.Pv; 68.35.Dv.

R. Zeyher, "Raman scattering from a superconductivity-induced bound state in MgB2." To appear in PRL. E-mail zeyher@greta5.mpi-stuttgart.mpg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302215.

G. P. Zhang, G. S. Chang, T. A. Callcott, D. L. Ederer, W. N. Kang, Eun-Mi Choi, Hyeong-Jin Kim, and Sung-Ik Lee, "An angle-resolved soft x-ray spectroscopy study of the electronic states of single crystal MgB2." Accepted to PRB. E-mail gpzhang@indstate.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302466.

Y. Zhao, X. F. Rui, C. H. Cheng, H. Zhang, P. Munroe, H. M. Zeng, N. Koshizuka, and M. Murakami, "Improved Irreversibility Behaviour and Critical Current Density in MgB2-Diamond Nanocomposites." E-mail y.zhao@unsw.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0302365.

S. H. Zhou, A. V. Pan, M. J. Qin, H. K. Liu, and S. X. Dou, "Effect of the processing parameters of MgB1.8(SiC)0.1/Fe tapes on the critical current density." To be published in Physica C (in press). Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia; tel. 61 2 42214558; fax 61 2 42215731; e-mail shi_dou@uow.edu.au. Key words: MgB2, MgB1.8(SiC)0.1/Fe tapes, critical current density, superconductor. 74.70.Ad; 74.60.Jg; 74.60.Ge; 74.25.Ha.

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March 2003 Preprints

S. Jemima Balaselvi, A. Bharathi, V. Sankara Sastry, G. L. N. Reddy, and Y. Hariharan, "Systematics in the superconducting and normal state properties in chemically substituted MgB2." Submitted to Phys. Rev B. A. Bharathi's e-mail bharathi@igcar.ernet.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303022.

Orjan Festin, Peter Svedlindh, W.N. Kang, Eun-Mi Choi, and Sung-Ik Lee, "Flux Noise in MgB2 Thin Films." Conference contribution to 'Fluctuations and Noise,' Santa Fe, New Mexico, 1-4 June 2003. E-mail orjan.festin@angstrom.uu.se; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303337.

A. T. Findikoglu, A. Serquis, L. Civale, X. Z. Liao, Y. T. Zhu, M. E. Hawley, and F. M. Mueller, "Microwave performance of high-density bulk MgB2." E-mail findik@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303283.

R. Flukiger, H. L. Suo, N. Musolino, C. Beneduce, P. Toulemonde, and P. Lezza, "Erratum to 'Superconducting properties of MgB2 tapes and wires' [Physica C 385 (2003) 286-305]." To be published in Physica C (in press). Departement de Physique de la Matiere Condensee, Universite de Geneve, 24 Quai Ernest-Ansermet, CH-1211 Geneve 4, Switzerland; tel. 41 22 702 6240; fax 41 22 702 6869; e-mail rene.flukiger@physics.unige.ch.

B. Q. Fu, Y. Feng, G. Yan, C. F. Liu, L. Zhou, L. Z. Cao, K. Q. Ruan, and X. G. Li, "High transport critical current in MgB2/Fe wire by in situ powder-in-tube process." To be published in Physica C (in press). Superconducting Materials Research Center, Northwest Institute for Nonferrous Metal Research, PO Box 51, Xi'an, Shaanxi 710016, People's Republic of China; tel. 86 29 6231079; fax 86 29 6224487; e-mail fubq@c-nin.com. Key words: MgB2, wire, powder-in-tube method, transport critical current density. 74.72.Yg; 74.80.Bj; 74.62.Bf; 74.60.Jg.

A. A. Golubov and A. E. Koshelev, "Upper critical field in dirty two-band superconductors: breakdown of the anisotropic Ginzburg-Landau theory." Submitted to Phys.Rev.B. E-mail a.golubov@tn.utwente.nl; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303237.

Hao Jin, Hai-Hu Wen, Hai-Peng Yang, Zhi-Yong Liu, Zhi-An Ren, Guang-Can Che, and Zhong-Xian Zhao, "Rigid vortices in the new superconductor MgB2." E-mail hjin@ssc.iphy.ac.cn; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303446.

Y. Koseoglu, B. Aktas, F. Yildiz, D. K. Kim, M. Toprak, and M. Muhammed, "ESR studies on high-Tc superconductor MgB2." To be published in Physica C (in press). Department of Physics, Fatih University, Hadimkoy Kampusu Buyukcekmece, 34900 Istanbul, Turkey; tel. 90 212 8890810; fax 90 212 8890832; e-mail yukselk@fatih.edu.tr. Key words: electron spin resonance (ESR), superconductivity. 74.72.-h; 74.60.-w; 76.30.-v.

X. Z. Liao, A. Serquis, Y. T. Zhu, L. Civale, D. L. Hammon, D. E. Peterson, F. M. Mueller, V. F. Nesterenko, and Y. Gu, "Defect structures in MgB2 wires introduced by hot isostatic pressing." A. Serquis' e-mail aserquis@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303009.

F. Parvin, A. K. M. A. Islam, F. N. Islam, A. F. M. A. Wahed, and M. E. Haque, "Mechanical behaviour of AgB2 in comparison to MgB2--a first principle study." To be published in Physica C (in press). Contact A. K. M. A. Islam, International Islamic University Chittagong, 154/A College Road, Chittagong 4203, Bangladesh; tel. 88 721 750980; fax 88 721 750064; e-mail azharislam46@yahoo.com. Key words: noble metal diborides, mechanical properties, pressure effects.

Ya. G. Ponomarev, S. A. Kuzmichev, M. G. Mikheev, M. V. Sudakova, S. N. Tchesnokov, N. Z. Timergaleev, A. V. Yarigin, E. G. Maksimov, S. I. Krasnosvobodtsev, A. V. Varlashkin, M. A. Hein, G. Muller, H. Piel, L. G. Sevastyanova, O. V. Kravchenko, K. P. Burdina, and B. M. Bulychev, "Experimental evidence of two-band behavior of MgB2." E-mail svet@mig.phys.msu.ru; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303640.

P. Samuely, Z. Holanova, P. Szabo, J. Kacmarcik, R. A. Ribeiro, S. L. Bud'ko, and P. C. Canfield, "Two band/two gap superconductivity in carbon-substituted MgB2 evidenced by point-contact spectroscopy." E-mail samuely@saske.sk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303644.

H. Schmidt, K. E. Gray, D. G. Hinks, J. F. Zasadzinski, M. Avdeev, J. D. Jorgensen, and J. C. Burley, "Retention of Two-Band Superconductivity in Highly Carbon-Doped MgB2." E-mail hschmidt@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303403.

A. Serquis , L. Civale, D. L. Hammon, X. Z. Liao, J. Y. Coulter, Y. T. Zhu, M. Jaime, D. E. Peterson, F. M. Mueller, V. F. Nesterenko, and Y. Gu, "Hot isostatic pressing of powder in tube MgB2 wires." E-mail aserquis@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303043.

S. Tsuda, T. Yokoya, Y. Takano, H. Kito, A. Matsushita, F. Yin, H. Harima, and S. Shin, "Definitive experimental evidence for two-band superconductivity in MgB2. E-mail tsuda@issp.u-tokyo.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0303636.

P. Udomsamuthirun, "Effect of in-plane Anisotropy on the Specific Heat Jump of MgB2." Submitted to Physica Status Solidi (B). Department of Physics, Faculty of Science, Srinakhariwirot University, Sukumvit 23 Road, Bangkok 10110, Thailand; e-mail: udomsamut55@yahoo.com. Key words: anisotropy, the specific heat jump, MgB2. 74.20.Fg; 74.72-h.

S. F. Wang, Y. L. Zhou, Y. B. Zhu, Q. Zhang, S. Y. Dai, K. Xie, Z. H. Chen, H. B. Lu, and G. Z. Yang, "Superconductivity, X-ray photoemission and Raman scattering study of MgB2 thin films." To be published in Physica C (in press). Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China; tel. 86 10 82649299; fax 86 10 82649531; e-mail wsf@aphy.iphy.ac.cn. Key words: superconducting thin films, X-ray photoemission, Raman scattering. 74.76.-W; 79.60.-I; 78.30.-J.

Shufang Wang, Yueliang Zhou, Yabin Zhu, Q. Zhang, Zhen Liu, Zhenghao Chen, Huibin Lu, Shouyu Dai, and Guozhen Yang, "MgB2 double-sided thick films fabricated on various metals by electrophoresis method." To be published in Physica C (in press). Laboratory of Optical Physics, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, PR China; tel. 86 10 82649299; fax 86 10 82649531; e-mail wsf@aphy.iphy.ac.cn. Key words: MgB2 thick films, electrophoresis method, metals substrates. 74.70.Ad; 74.78.-W; 81.15.Pq.

Takashi Yanagisawa and Hajime Shibata, "Anisotropic s-wave superconductivity in MgB2: comparison with experiments on optical properties." To be published in Physica C (in press). Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568; Japan; tel. 81 298 615374; fax 81 298 615387; e-mail t-yanagisawa@aist.go.jp. 74.20.-z; 74.70.-b; 74.25.Fy.

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April 2003 Preprints

Hiroya Abe, Makio Naito, Kiyoshi Nogi, Motohide Matsuda, Michihiro Miyake, Satoshi Ohara, Akira Kondo, and Takehisa Fukui, "Low temperature formation of superconducting MgB2 phase from elements by mechanical milling." To be published in Physica C (in press). Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka Ibaraki, Osaka 567-0047, Japan; tel./fax 81 6 6879 8660; e-mail h-abe@jwri.osaka-u.ac.jp. Key words: MgB2, mechanical milling, composite particles. 74.62.Yb; 74.70.Ad.

M. Angst, D. Di Castro, R. Puzniak, A. Wisniewski, J. Jun, S. M. Kazakov, J. Karpinski, S. Kohout, and H. Keller, "Anisotropic properties of MgB2 by torque magnetometry." Submitted to Physica C (M2S-Rio proceedings). E-mail angst@physik.unizh.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304400.

Etienne Boaknin, M. A. Tanatar, Johnpierre Paglione, D. G. Hawthorn, R. W. Hill, F. Ronning, M. Sutherland, Louis Taillefer, J. Sonier, S. M. Hayden, and J. W. Brill, "Multiband superconductivity in NbSe2 from heat transport." Submitted to M2S-Rio 2003 Proceedings. Johnpierre Paglione's e-mail paglione@physics.utoronto.ca; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304499.

A. V. Bobyl, D. V. Shantsev, Y. M. Galperin, A. A. F. Olsen, T. H. Johansen, W. N. Kang, and S. I. Lee, "Mesoscopic flux jumps in MgB2 films visualized by magneto-optical imaging." Proceedings of M2S-Rio. D. V. Shantsev's e-mail daniel.shantsev@fys.uio.no; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304603.

A. Carrington, P. J. Meeson, J. R. Cooper, L. Balicas, N. E. Hussey, E. A. Yelland, S. Lee, A. Yamamoto, S. Tajima, S. M. Kazakov, and J. Karpinski, "Determination of the Fermi Surface of MgB2 by the de Haas-van Alphen effect." E-mail a.carrington@bris.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304435.

T. Dahm, S. Graser, and N. Schopohl, "Fermi surface topology and vortex state in MgB2." E-mail dahm@uni-tuebingen.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304194.

Steven C. Erwin and I. I. Mazin, "Toward one-band superconductivity in MgB2." E-mail erwin@dave.nrl.navy.mil; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304456.

V. Ferrando, C. Bernini, P. Manfrinetti, D. Marre', M. Putti, C. Tarantini, and C. Ferdeghini, "Upper critical fields of MgB2 thin films." Submitted to Physica C (M2S-Rio proceedings). E-mail ferrandov@ge.infm.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304478.

V. Ferrando, D. Marre, P. Manfrinetti, I. Pallecchi, C. Tarantini, and C. Ferdeghini, "Pulsed Laser Deposition of epitaxial titanium diboride thin films." In press, Thin Solid Films. E-mail ferrandov@ge.infm.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304680.

A. M. Fogg, J. B. Claridge, G. R. Darling, and M. J. Rosseinsky, "Synthesis and characterisation of LixBC - hole doping does not induce superconductivity." In press, Chem. Comm. E-mail afogg@liverpool.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304662.

J. Horvat, S. Soltanian, X. L. Wang, and S. X. Dou, "The effect of sample size on field dependence of Jc for MgB2 superconductor." E-mail jhorvat@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304004.

B. B. Jin, T. Dahm, A. I. Gubin, Eun-Mi Choi, Hyun Jung Kim, Sung-IK Lee, W. N. Kang, and N. Klein, "Anomalous coherence peak in c-axis MgB2 thin film." E-mail b.b.jin@fz-juelich.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304051.

P. Jiji Thomas Joseph and Prabhakar P. Singh, "Theoretical Study of Electronic Structure and Superconductivity in Nb(1-x)B2 Alloys." Prabhakar P. Singh's e-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304437.

J. Karpinski, S. M. Kazakov, J. Jun, N. D. Zhigadlo, M. Angst, R. Puzniak, and A. Wisniewski, "MgB2 and Mg1-xAlxB2 single crystals: high-pressure growth and physical properties." Submitted to Physica C (M2S-Rio proceedings). S. M. Kazakov's e-mail kazakov@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304658.

S. M. Kazakov, J. Karpinski, J. Jun, P. Geiser, N. D. Zhigadlo, R. Puzniak, and A. V. Mironov, "Single crystal growth and properties of MgB2 and Mg(B1-xCx)2." Submitted to Physica C (M2S-Rio proceedings). E-mail kazakov@solid.phys.ethz.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304656.

K. Kokko, V. Kulmala, J. A. Leiro, and W. Hergert, "Resonant inelastic x-ray scattering (RIXS) spectra of magnesium diboride." E-mail kokko@utu.fi; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304682.

Yoji Ohashi, "Bound State and Order Parameter Mixing Effect by Nonmagnetic Impurity Scattering in Two-band Superconductors." J. Phys. Soc. Jpn. 71. E-mail ohashi@cm.ph.tsukuba.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304473.

A. Poddar, B. Bandyopadhyay, P. Mandal, D. Bhattacharya, P. Choudhury, U. Sinha, and B. Ghosh, "Studies of transport properties of MgB2 superconductor." To be published in Physica C (in press). Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064, India; tel. 91 337 534549; fax 91 33 3374637; e-mail poddar@cmp.saha.ernet.in. Key words: superconductor, resistivity, thermopower, thermal conductivity.

A. V. Pogrebnyakov, J. M. Redwing, J. E. Jones, X. X. Xi, S. Y. Xu, Q. Li, V. Vaithyanathan, and D. G. Schlom, "Thickness dependence of the properties of epitaxial MgB2 thin films grown by hybrid physical-chemical vapor deposition." E-mail avp11@psu.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304164.

T. Silver, J. Horvat, M. Reinhard, Y. Pei, S. Keshavarzi, P. Munroe, and S. X. Dou, "Uranium Doping and Thermal Neutron Irradiation Flux Pinning Effects in MgB2." J. Horvat's e-mail jhorvat@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304070.

Prabhakar P. Singh, "Carbon Doping in MgB2: Role of Boron and Carbon p_x(y) Bands." E-mail ppsingh@phy.iitb.ac.in; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304436.

S. Tsuda, R. Eguchi, A. Kosuge, T. Yokoya, A. Fukushima, S. Shin, A. Chainani, S. Otani, Y. Takano, K. Togano, and H. Kito, "X-ray absorption and resonant photoemission spectroscopy of ZrB2." To be published in Physica C (in press). Institute for Solid State Physics (ISSP), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan; tel./fax 81 4 7136 3545; e-mail tsuda@issp.u-tokyo.ac.jp. Key words: MgB2 related compounds, photoemission. 78.70.Dm; 79.60.-i; 71.20.Lp.

Bai-Mei Wu, Dong-Sheng Yang, Wei-Hua Zeng, Shi-Yan Li, Bo Li, Rong Fan, Xian-Hui Chen, Lie-Zhao Cao, and Marcel Ausloos, "Two band gap field-dependent thermal conductivity of MgB2." Marcel Ausloos' e-mail marcel.ausloos@ulg.ac.be; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0304416.

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May 2003 Preprints

M. Angst and R. Puzniak, "Two band superconductivity in MgB2: basic anisotropic properties and phase diagram." Invited chapter in vol. 1 of 'Horizons in Superconductivity Research' (Nova Publishers, NY), in print. E-mail angst@physik.unizh.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305048.

I. N. Askerzade, "Temperature dependence of some superconducting state parameters of a bulk MgB2 in two-band Ginzburg-Landau theory." To be published in Physica C (in press). Department of Physics, Faculty of Sciences, Ankara University, 06100 Tandoan-Ankara, Turkey; tel. 90 312 2126720; fax 90 312 2232395; e-mail iasker@science.ankara.edu.tr. Key words: magnesium diboride, two-band superconductivity, Ginzburg-Landau theory.

Toshiyuki Atsumi, Mitsuyuki Tsuji, Mingxiang Xu, Hideaki Kitazawa, and Takekazu Ishida, "Low-field magnetic torque of a single crystal MgB2." To be published in Physica C (in press). Contact Takekazu Ishida, Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; fax 81 722549908; e-mail ishida@center.osakafu-u.ac.jp. Key words: MgB2, magnetic torque, anisotropy. 74.60.Ge; 74.25.Ha; 75.90.+w.

D. Daghero, R. S. Gonnelli, G. A. Ummarino, O. V. Dolgov, J. Kortus, A. A. Golubov, and S. V. Shulga, "The determination of the electron-phonon interaction from tunneling data in the two-band superconductor MgB2." Proceedings of M2S-HTSC-VII conference, Rio de Janeiro (May 2003). E-mail ddaghero@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305563.

M. Eisterer, M. Zehetmayer, and H.W. Weber, "Current percolation and anisotropy in polycrystalline MgB2." Accepted for publication in Physical Review Letters (http://prl.aps.org/). E-mail eisterer@ati.ac.at; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305168.

H. Fang, S. Padmanabhan, Y.X. Zhou, and K. Salama, "High Critical Current Density in Iron-Clad MgB2 Tapes." To appear in Applied Physics Letters, June 2003. Texas Center for Superconductivity and Advanced Materials (TcSAM) and Department of Mechanical Engineering, University of Houston, Houston, TX 77204-4006; e-mail: hfang@uh.edu. Key words: MgB2, Powder-in-tube, Critical current density. 74.80.Bj.

R. S. Gonnelli, D. Daghero, G. A. Ummarino, Valeria Dellarocca, A. Calzolari, V. A. Stepanov, J. Jun, S. M. Kazakov, and J. Karpinski, "Directional point-contact spectroscopy of MgB2 single crystals in magnetic fields: two-band superconductivity and critical fields." Proceedings of M2S-HTSC-VII conference, Rio de Janeiro (May 2003). E-mail gonnelli@polito.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305560.

D. Goto, T. Machi, Y. Zhao, N. Koshizuka, M. Murakami, and S. Arai, "Improvement of critical current density in MgB2 by Ti, Zr and Hf doping." To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 10-13 Shinonome, 1-Chome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 5707; fax 81 3 3536 5705; e-mail dgto@istec.or.jp. Key words: pinning properties, MgB2, superconductivity. 74.70.Ad.

A. Gurevich, S. Patnaik, V. Braccini, K. H. Kim, C. Mielke, X. Song, L. D. Cooley, S. D. Bu, D. M. Kim, J. H. Choi, L. J. Belenky, J. Giencke, M. K. Lee, W. Tian, X. Q. Pan, A. Siri, E. E. Hellstrom, C. B. Eom, and D. C. Larbalestier, "Significant enhancement of the upper critical field in the two-gap superconductor MgB2 by selective tuning of impurity scattering." PRB, vol. 67. D. Larbalestier's e-mail larbalestier@engr.wisc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305474.

Heon-Jung Kim, W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, Kijoon H. P. Kim, H. S. Lee, Sung-Ik Lee, and Mi-Ock Mun, "Mixed-state magnetoresistance of c-axis-oriented MgB2 thin films." To be published in Physica C (in press). National Creative Research Initiative Center for Superconductivity and Department of Physics, Pohang University of Science and Technology, Pohang Kyungbuk 790-784, South Korea; tel. 82 54 279 5498; fax 82 54 279 5299; e-mail riddler@anyon.postech.ac.kr. Key words: MgB2 thin film, mixed-state magnetoresistance, vortex glass, thermally activated flux-flow. 74.25.Fy; 74.60.Ge; 74.70.Ad.

G. Lamura, A. J. Purnell, L. F. Cohen, A. Andreone, F. Chiarella, E. Di Gennaro, R. Vaglio, L. Hao, and J. Gallop, "Microwave intermodulation distortion of MgB2 thin films." To be published in Appl. Phys. Lett. E-mail gianrico.lamura@na.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305158.

Sergey Lee, Takahiko Masui, Ayako Yamamoto, Hiroshi Uchiyama, and Setsuko Tajima, "Carbon-substituted MgB2 single crystals." To be published in Physica C. E-mail lee@istec.or.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305485.

T. Machi, S. Shimura, N. Koshizuka, and M. Murakami, "Fabrication of MgB2 superconducting wire by in situ PIT method." To be published in Physica C (in press). Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 5707; fax 81 3 3536 5705; e-mail machi@istec.or.jp. Key words: MgB2, superconducting wire, in situ PIT. 74.70.Ad.

T. Masui, S. Lee, and S. Tajima, "Effect of the growing process on the electronic properties of MgB2 single crystals." To be published in Physica C (in press). Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan; tel. 81 3 3536 0618; fax 81 3 3536 5714; e-mail masui@istec.or.jp. Key words: MgB2, resistivity, anisotropy. 74.70.-b; 74.72.Yg; 74.25.Fy.

M. Mori, T. Tohyama, and S. Maekawa, "Tunneling spectra in multilayered superconductors with multiple gaps." To be published in Physica C (in press). Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan; tel. 81 22 215 2009; fax 81 22 215 2006; e-mail morimich@imr.tohoku.ac.jp. Key words: multilayer superconductor, tunneling conductance, multiple gaps. 74.20.-z; 74.50.+r; 74.72.-h; 74.80.-g.

S. Okuma, S. Togo, and K. Amemori, "Superconductivity and vortex states in thick amorphous MgxB1-x films." To be published in Physica C (in press). Research Center for Low Temperature Physics, Tokyo Institute of Technology, 2-12-1, Ohokayama, Meguro-ku, Tokyo 152-8551, Japan; tel. 81 3 5734 3252; fax 81 3 5734 2749; e-mail sokuma@o.cc.titech.ac.jp. Key words: amorphous films, Tc variation, phase diagram. 74.25.Fy; 74.60.Ec; 74.62.-c.

M. E. Palistrant, "Comment on 'Theory of two-band superconductors'." E-mail statphys@asm.md; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305496.

G. K. Perkins, Y. Bugoslavsky, A . D. Caplin, J. Moore, T. J. Tate, and R. Gwilliam, J. Jun, S. M. Kazakov, J. Karpinski, and L. F. Cohen, "Effects of proton irradiation and ageing on the superconducting properties of single crystalline and polycrystalline MgB2." E-mail g.perkins@ic.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305255.

Tanya Prozorov, Ruslan Prozorov, Alexey Snezhko, and Kenneth S. Suslick, "Sonochemical Modification of the Superconducting Properties of MgB2." Ruslan Prozorov's e-mail prozorov@boson.physics.sc.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305303.

M. J. Qin, S. Keshavarzi, S. Soltanian, X. L. Wang, H. K. Liu, and S. X. Dou, "On the sample size dependence of the critical current density in MgB2 superconductors." E-mail qin@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305201.

C. Senatore, M. Polichetti, N. Clayton, R. Flukiger, and S. Pace, "Detection of the Vortex Dynamic Regimes in MgB2 by Third Harmonic AC Susceptibility Measurements." To be published in "Horizons in Superconductivity Research" (Nova Science Publishers, Inc., NY, 2003). E-mail carmelo@sa.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305523.

A. Serquis, X. Z. Liao, L. Civale, Y. T. Zhu, J. Y. Coulter, D. E. Peterson, and F. M. Mueller, "The influence of structural defects on intra-granular critical currents of bulk MgB2." To be published in IEE Transactions in Applied Superconductivity. E-mail aserquis@lanl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305027.

I. Shigeta, T. Abiru, K. Abe, A. Nishida, and Y. Matsumoto, "Temperature and field dependence of magnetization of MgB2 polycrystals." To be published in Physica C (in press). Advanced Materials Institute, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan; tel. 81 92 871 6631x6582; fax 81 92 865 6031; e-mail sige1dsc@yahoo.co.jp. Key words: MgB2, magnetization, critical current density, pinning force density, upper critical field. 74.25.Ha; 74.60.Ge; 74.60.Jg; 74.72.Yg.

Hisashi Shimakage, Atsushi Saito, Akira Kawakami, and Zhen Wang, "Optimizing preparation of as-grown MgB2 thin films made using the co-evaporation method." To be published in Physica C (in press). KARC, Communications Research Laboratory, Iwaoka, Kobe 651-2492 Japan; tel. 81 78 969 2194; fax 81 78 969 2199; e-mail simakage@crl.go.jp. Key words: MgB2, thin films, co-evaporation, as-grown. 74.76.

Kyoji Tachikwa, Yutaka Yamada, Masakazu Enomoto, Makoto Aodai, and Hiroaki Kumakura, "Structure and critical current of Ni-sheathed PIT MgB2 tapes with In metal powder addition." To be published in Physica C (in press). Faculty of Engineering, Tokai University, 1117 Kita-Kaname, Hiratsuka, Kanagawa 259-1292, Japan; tel. 81 463 58 1211; fax 81 463 50 2096; e-mail tacsuper@keyaki.cc.u-tokai.ac.jp. Key words: MgB2, PIT tape, Ni sheath, In metal powder addition, critical current. 74.70.Ad; 74.60.Jg.

Ken'ichi Takahashi, Kazuo Satoh, Tsutomu Yotsuya, Satoru Okayasu, Kiichi Hojou, Masaki Katagiri, Atsushi Saito, Akira Kawakami, Hisashi Shimakage, Zhen Wang, and Takekazu Ishida, "Design of neutron detector by using a novel superconductor MgB2." To be published in Physica C (in press). Contact Takekazu Ishida, Department of Physics and Electronics, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan; fax 81 722549908; e-mail ishida@center.osakafu-u.ac.jp. Key words: MgB2, film, neutron, electronic devices. 74.76.Db; 87.64.Bx; 85.25.-j.

L. Tewordt and D. Fay, "Two-band theory of specific heat and thermal conductivity in the mixed state of MgB2." Submitted to Phys. Rev. B. D. Fay's e-mail fay@physnet.uni-hamburg.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305301.

K. A. Yates, G. Burnell, N. A. Stelmashenko, D.-J. Kang, H. N. Lee, B. Oh, and M. G. Blamire, "Disorder induced collapse of the electron phonon coupling in MgB{2} observed by Raman Spectroscopy." E-mail kay21@cam.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0305466.

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June 2003 Preprints

E. Cappelluti, S. Ciuchi, C. Grimaldi, and L. Pietronero, "Band-filling effects on electron-phonon properties of normal and superconducting state." E-mail emmcapp@pil.phys.uniroma1.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306644.

K. B. Chashka, B. Fisher, M. Kapon, L. Patlagan, and G. M. Reisner, "A single crystal of MgAlB4 compared with polycrystalline Mg1-xAlxB2 with x near 0.5." Contact B. Fisher, Department of Physics, Crown Center for Superconductivity, Haifa 32000, Israel; tel. 972 4 8293652; fax 972 4 8221514; e-mail phr0bg@physics.technion.ac.il. Key words: x-ray diffraction, superstructure, superconductivity, thermopower. 61.10.Nv; 74.70.Ad; 72.15.Jf; 72.15.-v.

J. Horvat, "Interaction of superconductor with magnetic sheath as a way for improvement of critical current in MgB2/Fe superconductor." To appear in Horizons in Superconductivity Research, Vol. 1, Nova Science Publishers, NY 2003. E-mail jhorvat@uow.edu.au; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306083.

Michele Lazzeri, Matteo Calandra, and Francesco Mauri, "Anharmonic phonon frequency shift in MgB2." Matteo Calandra's e-mail matteo.calandra@lmcp.jussieu.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306650.

Yanwei Ma, H. Kumakura, A. Matsumoto, H. Hatakeyama, and K. Togano, "Improvement of critical current density in Fe-sheathed MgB2 tapes by ZrSi2, ZrB2 and WSi2 doping." E-mail yanwei.ma@univ-rennes1.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306652.

E. Martinez and R. Navarro, "Possibilities of MgB2/Cu Wires Fabricated by the in-situ Reaction Technique." To be published in "Horizons in Superconductivity Research" (Nova Science Publishers, Inc., NY, 2003). E-mail elenamar@posta.unizar.es; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306090.

Tadafumi Ohsaku, "Relativistic Model for two-band Superconductivity." To be published in RCNP (Osaka Univ.). E-mail tadafumi@phys.wani.osaka-u.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306472.

T. A. Prikhna, W. Gawalek, Ya. M. Savchuk, V. E. Moshchil, N. V. Sergienko, R. Hergt, M. Wendt, S. N. Dub, Ch. Schmidt, J. Dellith, V. S. Melnikov, T. Habisreuther, D. Litzkendorf, and P. A. Nagorny, "High-pressure synthesis of MgB2 with addition of Ti." Preprint available at http://xxx.lanl.gov/abs/cond-mat/0306013.

M. Putti, E. Galleani, I. Pallecchi, C. Bernini, P. Manfrinetti, A. Palenzona, and M. Affronte, "Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of p and s bands." Presented at the M2S-HTSC Conference, 25-30 May 2003, Rio de Janeiro. E-mail putti@fisica.unige.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306137.

Morsy M. A. Sekkina and Khaled M. Elsabawy, "Narrow range of iridium-substitution on Mg1-xIrxB2 superconductor." To be published in Physica C (in press). C/o Jansen Gp., Max Plank Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany; fax 49 711 689 1010; e-mail k.elsabawy@fkf.mpg.de. Key words: Ir-doping, x-ray, crystal structure, SEM, MgB2 superconductor.

A. Shibata, M. Matsumoto, K. Izawa, Y. Matsuda, S. Lee, and S. Tajima, "Anomalous Flux Flow Resistivity in Two Gap Superconductor MgB2." Y. Matsuda's e-mail ym@issp.u-tokyo.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0306057.

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July 2003 Preprints

M. Acquarone and L. Romano, "A model Hamiltonian for MgB2 which takes into account its unusual phononic features." Accepted by The European Physical Journal B. L. Romano's e-mail romano@fis.unipr.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307249.

Y. Bugoslavsky, Y. Miyoshi, G. K. Perkins, A. D. Caplin, L. F. Cohen, A. V. Pogrebnyakov, X. X. Xi, "The effect of magnetic field on the two superconducting gaps in MgB2." E-mail y.bugoslav@imperial.ac.uk; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307540.

Hyoung Joon Choi, David Roundy, Hong Sun, Marvin L. Cohen, and Steven G. Louie, "Reply to 'Comment on First-principles calculation of the superconducting transition in MgB2 within the anisotropic Eliashberg formalism'." E-mail hjchoi@civet.berkeley.edu; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307012.

D. Di Castro, R. Khasanov, D. G. Eshchenko, A. Shengelaya, M. Angst, I. M. Savic, K. Conder, J. Roos, S. M. Kazakov, J. Karpinski, and H. Keller, "Study of the boron isotope effect on the magnetic penetration depth in MgB{2}." E-mail dicastro@physik.unizh.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307330.

V. Ferrando, P. Manfrinetti, D. Marre', M. Putti, I. Sheikin, and C. Tarantini, C. Ferdeghini, "Effect of two bands on critical fields in MgB2 thin films with various resistivity values." Submitted to Phys. Rev. B. E-mail ferrandov@ge.infm.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307013.

Motoharu Imai, El-Hadi S. Sadki, Hideki Abe, Kenji Nishida, Takashi Kimura, Taku Sato, Kazuto Hirata, and Hideaki Kitazawa, "Superconducting properties of single crystalline Ca(Al0.5,Si0.5)2, a ternary silicide with the AlB2-type structure." Hideki Abe's e-mail abe.hideki@nims.go.jp.

P. Kovac, M. Ahoranta, J. Lehtonen, and I. Husek, "The Ic(B) behavior of MgB2 composite with ferromagnetic sheath." To be published in Physica C (in press). Department of Superconductor, Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska Cesta 9, 84239 Bratislava, Slovakia; tel. 421 7 5477 2841; fax 421 7 5477 5816; e-mail elekkova@savba.sk.

P. Lezza, V. Abacherli, N. Clayton, C. Senatore, D. Uglietti, H. L. Suo, and R. Flukiger, "Transport Properties and Exponential n-values of Fe/MgB2 Tapes With Various MgB2 Particle Sizes." Presented at ICMC 2003, 25-28 May 2003. E-mail paola.lezza@physics.unige.ch; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307398.

R. Lortz, C. Meingast, D. Ernst, B. Renker, D. D. Lawrie, and J. P. Franck, "High-Resolution Thermal Expansion of MgB2." J of Low Temp. Phys. Vol. 131, Nos. 5/6, 2003. C. Meingast's e-mail christoph.meingast@ifp.fzk.de; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307157.

L. Lyard, P. Szabo, T. Klein, J. Marcus, C. Marcenat, B. W. Kang, K. H. Kim, H. S. Lee, and S. I. Lee, "Anisotropies of the lower and upper critical fields in MgB2 single crystals." T. Klein's e-mail klein@grenoble.cnrs.fr; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307388.

J. Nakamura, S. Nasubida, E. Kabasawa, H. Yamazaki, N. Yamada, K. Kuroki, M. Watanabe, T. Oguchi, S. Lee, A. Yamamoto, S. Tajima, Y. Umeda, S. Minakawa, N. Kimura, H. Aoki, S. Otani, S. Shin, T. A. Callcott, D. L. Ederer, J. D. Denlinger, and R. C. C. Perera, "Electronic Structure of B-2p\sigma and p\pi States in MgB2, AlB2 and ZrB2 Single Crystals." To appear in Phys. Rev. B. E-mail jin@pc.uec.ac.jp; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307376.

A. Rydh, U. Welp, J. M. Hiller, A. Koshelev, W. K. Kwok, G. W. Crabtree, K. H. P. Kim, C. U. Jung, H.-S. Lee, B. Kang, and S.-I. Lee, "Surface Contribution to the Superconducting Properties of MgB2 Single Crystals." E-mail rydh@anl.gov; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307445.

S. Sarti, C. Amabile, N. Tosoratti, and E. Silva, "Surface impedance of superconductive thin films as a function of frequency in microwave range." E-mail stefano.sarti@roma1.infn.it; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307143.

A. Tampieri, G. Celotti, S. Sprio, R. Caciuffo, and D. Rinaldi, "Study of the sintering behaviour of MgB2 superconductor during hot-pressing." To be published in Physica C (in press). ISTEC-CNR, Via Granarolo 64, 48018 Faenza (RA), Italy; tel. 39 5466 99711; fax 39 5464 6381; e-mail sprio@istec.cnr.it.

R. V. Viznichenko, A. A. Kordyuk, G. Fuchs, K. Nenkov, K.-H. Muller, T. A. Prikhna, and W. Gawalek, "Temperature dependence of trapped magnetic field in MgB2 bulk superconductor." Submitted to APL. E-mail vrv@imp.kiev.ua; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0307318.

H. D. Yang, H. L. Liu, J.-Y. Lin, M. X. Kuo, P. L. Ho, J. M. Chen, C. U. Jung, Min-Seok Park, and Sung-Ik Lee, "X-ray absorption and optical spectroscopy studies of (Mg{1-x}Alx)B2." Phys. Rev. B, in press. J.-Y. Lin's e-mail ago@cc.nctu.edu.tw; preprint also available at http://xxx.lanl.gov/abs/cond-mat/0308081.

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August 2003 Preprints

I. N. Askerzade, "Ginzburg-Landau theory for two-band s-wave superconductors: application to non-magnetic borocarbides LuNi2B2C, YNi2B2C and magnesium diboride MgB2." To be published in Physica C (in press). Department of Physics, Faculty of Sciences, Ankara University, Tandogan, Ankara 06100, Turkey; tel. 90 312 212 6720; fax 90 312 223 2395; e-mail iasker@science.ankara.edu.tr. 74.20.De; 74.20.Mn.

Y. M. Cho and H. J. Khim, "Non-Abelian Vortices in Condensed Matter." E-mail ymcho@yongmin.snu.ac.kr; preprint also available at http://arXiv.org/abs/cond-mat/0308182.

S. X. Dou, V. Braccini, S. Soltanian, R. Klie, Y. Zhu, S. Li, X. L. Wang, and D. Larbalestier, "Nanoscale-SiC doping for enhancing Jc and Hc2 in the Superconducting MgB2." S. Soltanian's e-mail ss27@uow.edu.au; preprint also available at http://arXiv.org/abs/cond-mat/0308265.

R. S. Gonnelli, D. Daghero, A. Calzolari, G. A. Ummarino, Valeria Dellarocca, V. A. Stepanov, J. Jun, S. M. Kazakov, and J. Karpinski, "The Magnetic-field Dependence of the Gaps in a Two-band Superconductor: A Point-contact Study of MgB2 Single Crystals." E-mail renato.gonnelli@polito.it; preprint also available at http://arXiv.org/abs/cond-mat/0308152.

J.-Y. Lin and H. D. Yang, "MgCNi3: a conventional and yet puzzling superconductor." Tentatively to appear in "Horizons in Superconductivity" by Nova Science Publishers, Inc. E-mail ago@cc.nctu.edu.tw; preprint also available at http://arXiv.org/abs/cond-mat/0308198.

Jan Mucha, Marek Pekala, Jadwiga Szydlowska, Wojciech Gadomski, Jun Akimitsu, Jean-Francois Fagnard , Philippe Vanderbemden, Rudi Cloots, and Marcel Ausloos, "Magnetotransport Study of MgB2 Superconductor." To be published in Supercond. Sci. Technology. Marcel Ausloos' e-mail marcel.ausloos@ulg.ac.be.

A. Rydh, U. Welp, A. E. Koshelev, W. K. Kwok, G. W. Crabtree, R. Brusetti, L. Lyard, T. Klein, C. Marcenat, B. Kang, K. H. Kim, K. H. P. Kim, H.-S. Lee, and S.-I. Lee, "Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals." E-mail rydh@anl.gov; preprint also available at http://arXiv.org/abs/cond-mat/0308319.

H. D. Yang, S. Mollah, W. L. Huang, P. L. Ho, H. L. Huang, C.-J. Liu, J.-Y. Lin, Y.-L. Zhang, R.-C. Yu, and C.-Q. Jin, "Pressure effects on the Tc of superconducting MgCxNi3." Phys. Rev. B, in press. J.-Y. Lin's e-mail ago@cc.nctu.edu.tw; preprint also available at http://arXiv.org/abs/cond-mat/0308197.

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September 2003 Preprints

A. Q. R. Baron, H. Uchiyama, Y. Tanaka, S. Tsutsui, D. Ishikawa, S. Lee, R. Heid, K.-P. Bohnen, S. Tajima, and T. Ishikawa, "Kohn Anomaly in MgB2 by Inelastic X-Ray Scattering." E-mail baron@spring8.or.jp; preprint also available at http://arXiv.org/abs/cond-mat/0309123.

Y. Bugoslavsky, Y. Miyoshi, G. K. Perkins, A. D. Caplin, L. F. Cohen, H. Y. Zhai, H. M. Christen, A. V. Pogrebnyakov, X. X. Xi, and O. V. Dolgov, "Superconducting gap structure and pinning in disordered MgB2 films." Paper presented at EUCAS'03. E-mail y.bugoslav@imperial.ac.uk; preprint also available at http://arXiv.org/abs/cond-mat/0309589.

A. D. Caplin, Y. Bugoslavsky, L. F. Cohen, and G. K. Perkins, "The current-voltage relationship in crystals and conductors." To be published in Physica C (in press). Blackett Laboratory, Imperial College London, London SW7 2 BZ, UK; tel. 44 20 7594 7608; fax 44 20 7581 3817; e-mail d.caplin@imperial.ac.uk. Key words: superconductor, current-voltage characteristic. 74.70.

Y. M. Cho, "Superconducting Knot and Quantized Supercurrent in Two-gap Superconductor." E-mail ymcho@yongmin.snu.ac.kr; preprint also available at http://arXiv.org/abs/cond-mat/0112498.

V. Ferrando, C. Tarantini, P. Manfrinetti, D. Marre', M. Putti , A. Tumino, and C. Ferdeghini, "High critical fields in MgB2 thin films with various resistivity values." Proceedings of EUCAS Conference 2003. E-mail ferrandov@ge.infm.it; preprint also available at http://arXiv.org/abs/cond-mat/0309543.

A. Agliolo Gallitto, M. Bonura, S. Fricano, M. Li Vigni, and G. Giunchi, "Fluxon dynamics by microwave surface resistance measurements in MgB2." S. Fricano's e-mail fricano@fisica.unipa.it; preprint also available at http://arXiv.org/abs/cond-mat/0309654.

G. Giunchi, S. Raineri, R. Wesche, and P. L. Bruzzone, "The voltage-current relations for MgB2 obtained by reactive liquid infiltration." To be published in Physica C (in press). EDISON Spa, R&D, Via U. Bassi 2, 20159 Milan, Italy; tel. 39 02 6222 3194; fax 39 02 6222 3074/6222 3071; e-mail giovanni.giunchi@edison.it. Key words: bulk MgB2, flux flow, critical current density, activation energy, n-factor.

Wilfried Goldacker, Sonja I. Schlachter, Bing Liu, Bernhard Obst, and Evgenie Klimenko, "Considerations on critical currents and stability of MgB2 wires made by different preparation routes." To be published in Physica C (in press). Forschungszentrum Karlsruhe, Institut fur Technische Physik, PO Box 3640, Karlsruhe D-76021, Germany; tel. 49 7247 824 179; fax 49 7247 825 398; e-mail wilfried.goldacker@itp.fzk.de. Key words: superconductivity, critical currents, thermal stability, MgB2. 74.60.Jg; 74.62.Bf.

R. S. Gonnelli, D. Daghero, A. Calzolari, G. A. Ummarino, V. Dellarocca, V. A. Stepanov, S. M. Kazakov, J. Karpinski, C. Portesi, E. Monticone, V. Ferrando, and C. Ferdeghini, "Point-Contact Spectroscopy in MgB2: from Fundamental Physics to Thin-Film Characterization." Proceedings of 6th EUCAS Conference (14-18 September 2003, Sorrento - Italy). E-mail renato.gonnelli@polito.it; preprint also available at http://arXiv.org/abs/cond-mat/0309545.

S. Graser, T. Dahm, and N. Schopohl, "Influence of Fermi surface topology on the quasiparticle spectrum in the vortex state." E-mail siegfried.graser@uni-tuebingen.de; preprint also available at http://arXiv.org/abs/cond-mat/0309142.

A. Gurevich, S. Patnaik, V. Braccini, K. H. Kim, C. Mielke, X. Song, L. D. Cooley, S. D. Bu, D. M. Kim, J. H. Choi, L. J. Belenky, J. Giencke, M. K. Lee, W. Tian, X. Q. Pan, A. Siri, E. E. Hellstrom, C. B. Eom, and D. C. Larbalestier, "Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering." D. Larbalestier's e-mail larbalestier@engr.wisc.edu; preprint also available at http://arXiv.org/abs/cond-mat/0305474.

Kazumune Katagiri, Akifumi Iwamoto, Yoshitaka Shoji, Kyoji Tachikawa, Yutaka Yamada, Kazuo Watanabe, and Toshiyuki Mito, "Stress/strain characteristics of PIT MgB2 tapes with nickel sheath--effect of indium addition to the core." To be published in Physica C (in press). Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka 020-8551, Japan; tel./fax 81 19 621 6412; e-mail katagiri@iwate-u.ac.jp. Key words: MgB2 tape, indium addition, mechanical property, critical current. 74.70.Ad; 74.25.Fy; 74.25.Ld.

H. Kitaguchi, A. Matsumoto, H. Hatakeyama, and H. Kumakura, "V-I characteristics of MgB2 PIT composite tapes: n-values under strain, in high fields, or at high temperatures." To be published in Physica C (in press). Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan; tel. 81 298 59 2329; fax 81 298 59 2301; e-mail kitaguchi.hitoshi@nims.go.jp. Key words: MgB2, strain effect, critical current. 74.70.Ad; 85.25.Kx; 74.60.Jg.

L. Z. Kon, "Some kinetic properties of the two-band superconductors." Preprint available at http://arXiv.org/abs/cond-mat/0309707.

P. Kovac, I. Husek, and T. Melisek, "The effect of used deformation, metal sheath and heat treatment on the I-V curve of ex situ MgB2 composite." To be published in Physica C (in press). Department of Superconductor, Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 841 04 Bratislava, Slovakia; tel. 421 7 5477 2841; fax 421 7 5477 5816; e-mail elekkova@savba.sk. Key words: MgB2 composite, V-I characteristics, n-exponents, grain connectivity, pinning. 84.71.Mn; 74.25.Sv.

Z.-J. Liu, S. H. Zhou, X. X. Xi, and Z.-K. Liu, "Thermodynamic reactivity of the magnesium vapor with substrates materials during MgB2 deposition." To be published in Physica C (in press). Department of Materials Science and Engineering, The Pennsylvania State University, 107 Steidle Building, University Park, PA 16802.

M. Majoros, A. M. Campbell, B. A. Glowacki, and R. I. Tomov, "Numerical modeling of heating and current-sharing effects on I-V curves of Y1Ba2Cu3O7 and MgB2 conductors." To be published in Physica C (in press). IRC in Superconductivity, University of Cambridge, Madingley Road, CB3 0HE Cambridge, UK; tel. 44 1223 337 441; fax 44 1223 337 074; e-mail mm293@cam.ac.uk. Key words: superconductivity, MgB2, coated conductors, stability. 74.60.Jg.

T. Sakuntala, S. K. Deb, A. Bharathi, S. Jemima Balaselvi, C. S. Sundar, and Y. Hariharan, "Raman Studies in MgB2-xCx." Submitted to DAE Solid State Physics Symposium December 2003. A. Bharathi's e-mail bharathi@igcar.ernet.in; preprint also available at http://arXiv.org/abs/cond-mat/0309400.

C. Senatore, N. Clayton, P. Lezza, M. Polichetti, S. Pace, and R. Flukiger, "Third Harmonic Susceptibility and the Irreversibility Line of Fe/MgB2 Tapes." E-mail carmelo@sa.infn.it; preprint also available at http://arXiv.org/abs/cond-mat/0309286.

C. Senatore, M. Polichetti, N. Clayton, R. Flukiger, and S. Pace, "Non-linear magnetic response of MgB2 bulk superconductors." To be published in Physica C (in press). Dipartimento di Fisica "E. R. Caianiello" and INFM, Universita degli Studi di Salerno, Via S. Allende, Baronissi (SA) 84081, Italy; tel. 39 8996 5289; fax 39 8995 3804; e-mail carmelo@sa.infn.it. Key words: ac susceptibility, MgB2, vortex dynamic. 74.25.Qt; 74.70.Ad; 75.40.Gb; 75.40.Mg.

R. Tao, X. Xu, and E. Amr, "MgB2 superconducting particles in a strong electric field." To be published in Physica C (in press). Department of Physics, Temple University, Barton Hall (009-00), 1900 N. 13th Street, Philadelphia, PA 19122-6082; tel. 215 204 7651; fax 215 204 5652; e-mail rtao@astro.temple.edu. Key words: electric-field induced superconducting ball, surface energy, temperature effect on ball formation, electric-field screening length. 74.90.+n; 74.72.-h; 74.25.-q; 68.35.Md.

Y. Xu, M. Khafizov, L. Satrapinsky, P. Kus, A. Plecenik, and R. Sobolewski, "Time-resolved dynamics of the superconducting two-gap state in MgB2 thin films." Accepted for publication in Phys. Rev. Lett. A. Plecenik's e-mail plecenik@fmph.uniba.sk; preprint also available at http://arXiv.org/abs/cond-mat/0309664.

Takashi Yanagisawa and Hajime Shibata, "Orbital-dependent two-band superconductivity in MgB2." E-mail t-yanagisawa@aist.go.jp; preprint also available at http://arXiv.org/abs/cond-mat/0309095.

I. K. Yanson and Yu. G. Naidyuk, "Point-contact spectroscopy of two-band superconductor MgB2." Invited talk at NATO ARW "Frontiers in Spectroscopy of Emergent Materials" 13 -19 Sept. 2003, Sudak, Ukraine; will be published in Proceedings by Kluwer Acad. Publ. Yu. G. Naidyuk's e-mail naidyuk@ilt.kharkov.ua; preprint also available at http://arXiv.org/abs/cond-mat/0309693.

Q. W. Yao, X. L. Wang, J. Horvat, and S. X. Dou, "Cu and nano-SiC doped MgB2 thick films on Ni substrates processed using a very short-time in situ reaction." To be published in Physica C (in press). Contact X. L. Wang, Institute for Superconducting and Electronic Materials, University of Wollongong, Northfields Avenue, NSW 2522, Australia; fax 61 2 4221 5731; e-mail xiaolin@uow.edu.au. Key words: MgB2, thick films, critical current density, substrate.

M. E. Zhitomirsky and V.-H. Dao, "Ginzburg-Landau theory of vortices in a multi-gap superconductor." E-mail mike.zhitomirsky@cea.fr; preprint also available at http://arXiv.org/abs/cond-mat/0309372.

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October 2003 Preprints

M. Ahoranta, J. Lehtonen, and P. Kovac, "Feasibility of iron-sheathed MgB2 wires for magnet applications." To be published in Physica C (in press). Institute of Electromagnetics, Tampere University of Technology, PO Box 692, 33 101 Tampere, Finland; tel. 358 3 3115 2009; fax 358 3 3115 2160; e-mail maria.ahoranta@tut.fi. Key words: MgB2, magnet applications, iron sheath. 85.25.Am; 85.25.Ly; 74.70.-b.

J. Demsar, R. D. Averitt, A. J. Taylor, V. V. Kabanov, W. N. Kang, H. J. Kim, E. M. Choi, and S. I. Lee, "Pair-breaking and superconducting state recovery dynamics in MgB2." To be published in Physical Review Letters. E-mail jdemsar@lanl.gov; preprint also available at http://arXiv.org/abs/cond-mat/0310379.

S. X. Dou, W. K. Yeoh, J. Horvat, and M. Ionescu, "Effect of carbon nanotube doping on critical current density of MgB2 superconductor." J. Horvat's e-mail jhorvat@uow.edu.au; preprint also available at http://arXiv.org/abs/cond-mat/0310196.

A. Agliolo Gallitto, M. Li Vigni, and G. Vaglica, "Time Evolution of the Microwave Second-Harmonic Response of MgB2 Superconductor." Proceedings of the Third European Conference on Vortex Matter in Superconductors, to be published in Physica C. E-mail agliolo@fisica.unipa.it; preprint also available at http://arXiv.org/abs/cond-mat/0310313.

Catalin Pascu Moca, Gergely Zarand, Eugene Demler, and Boldizsar Janko, "Shiba multiplets due to Mn impurities in MgB2." E-mail mocap@uoradea.ro; preprint also available at http://arXiv.org/abs/cond-mat/0310748.

O. Ozogul, N. Guclu, and A. Gencer, "Ac magnetic response of MgB2 bulk superconductor based on Anderson-Kim model." To be published in Physica C (in press). Faculty of Science, Department of Physics, Ankara University, 06100-Tandogan, Ankara, Turkey; e-mail ozogul@science.ankara.edu.tr. 74.25.Ha; 74.70.Ad; 74.25.Sv.

M. Putti, V. Braccini, C. Ferdeghini, I. Pallecchi, A. S. Siri, F. Gatti, P. Manfrinetti, and A. Palenzona, "Critical Field of MgB2 : Crossover from Clean to Dirty Regimes." E-mail putti@fisica.unige.it; preprint also available at http://arXiv.org/abs/cond-mat/0310461.

T. Tajima, F. L. Krawczyk, J. Liu, D. C. Nguyen, D. L. Schrage, A. Serquis, A. H. Shapiro, V. F. Nesterenko, and Y. Gu, "RF Surface Resistance of a HIPped MgB2 Sample at 21 GHz." EUCAS2003 J. Liu's e-mail jfliu@lanl.gov; preprint also available at http://arXiv.org/abs/cond-mat/0310213.

O. Tschauner, D. Errandonea, and G. C. Serghiou, "Phase transition in MgB2 at elevated pressure and temperature." E-mail olivert@physics.unlv.edu; preprint also available at http://arXiv.org/abs/cond-mat/0310312.

G. A. Ummarino, R. S. Gonnelli, S. Massidda, and A. Bianconi, "Two-band Eliashberg equations and the experimental Tc of the diboride Mg1-xAlxB2." E-mail giovanni.ummarino@infm.polito.it; preprint also available at http://arXiv.org/abs/cond-mat/0310284.

P. Vasek, "Transverse voltage in zero external magnetic fields, its scaling and violation of the time reversal symmetry in MgB2." E-mail vasek@fzu.cz; preprint also available at http://arXiv.org/abs/cond-mat/0310136.

L. M. Volkova, S. A. Polyshchuk, and F. E. Herbeck, "Why Tc of MgB2 is the highest in a number of diborides?" From the chapter, "Correlation of Tc with Crystal Chemical Parameters in High-Tc Cuprates, Diborides and Borocarbides: Concept of Arrangement and Function of Layered Superconductors" in "Focus on Superconductivity Research," Barry P. Martins., Ed., Nova Science Publisher, Inc. N.Y., 2003, (in print). E-mail volkova@ich.dvo.ru; preprint also available at http://arXiv.org/abs/cond-mat/0310511.

G. J. Xu, J.-C. Grivel, A. B. Abrahamsen, X. P. Chen, and N. H. Andersen, "Structure and superconductivity of double-doped Mg1-x(Al0.5Li0.5)xB2." To be published in Physica C (in press). Materials Research Department, Riso National Laboratory, PO Box 49, 4000 Roskilde, Denmark; e-mail xugj@ustc.edu.cn. Key words: MgB2, substitution effect, AC-susceptibility, irreversibility field, superconductivity.

I. K. Yanson, S. I. Beloborod'ko, and Yu. G. Naidyuk, "Self-energy Effect of Superconducting Energy Gap in Point-Contact Spectra of MgB2." E-mail yanson@ilt.kharkov.ua; preprint also available at http://arXiv.org/abs/cond-mat/0310577.

Yue Zhao, Mihail Ionescu, Alexey V. Pan, Shi Xue Dou, and E. W. Collings, "In situ annealing of superconducting MgB2 films prepared by pulsed laser deposition." E-mail yz70@uow.edu.au; preprint also available at http://arXiv.org/abs/cond-mat/0310755.

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November 2003 Preprints

Denis A. Gorokhov, "Surface Superconductivity of Dirty Two-Band Superconductors: Applications to {\rm MgB}2." E-mail gorokhov@ccmr.cornell.edu; preprint also available at http://arXiv.org/abs/cond-mat/0312014.

V. G. Kogan and N. V. Zhelezina, "Penetration depth anisotropy in two-band superconductors." E-mail kogan@ameslab.gov; preprint also available at http://arXiv.org/abs/cond-mat/0311331.

M. N. Kunchur, C. Wu, D. H. Arcos, B. I. Ivlev, Eun-Mi Choi, Kijoon H. P. Kim, W. N. Kang, and Sung-Ik Lee, "Critical flux pinning and enhanced upper-critical-field in magnesium diboride films." Phys. Rev. B 68, 100503 (2003). Preprint available at http://arXiv.org/abs/cond-mat/0311364.

I. Kusevic, E. Babic, O. Husnjak, S. Soltanian, X. L. Wang, and S. X. Dou, "Correlated vortex pinning in Si-nanoparticle doped MgB2." E-mail ikusevic@phy.hr; preprint also available at http://arXiv.org/abs/cond-mat/0311425.

R. E. Lagos and G. G. Cabrera, "A two band model for Superconductivity: Probing interband pair formation." G. G. Cabrera's e-mail cabrera@ifi.unicamp.br; preprint also available at http://arXiv.org/abs/cond-mat/0311196. 74.20.-z; 74.20.Fg; 74.70.Ad.

T. A. Prikhna, W. Gawalek, Ya. M. Savchuk, V. E. Moshchil, N. V. Sergienko, T. Habisreuther, M. Wendt, R. Hergt, Ch. Schmidt, J. Dellith, V. S. Melnikov, A. Assmann, D. Litzkendorf, and P. A. Nagorny, "High-pressure synthesis of MgB2 with addition of Ti." Institute for Superhard Materials, 2 Avtozavodskaya Street, Kiev 04074, Ukraine; tel. 380 44 430 11 26; fax 380 44 468 86 25; e-mail prikhna@iptelecom.net.ua. Key words: MgB2-based bulk superconductor, Ti, high-pressure synthesis. 74.72.Yg; 74.62.Bf.

I. K. Yanson, S. I. Beloborod'ko, Yu. G. Naidyuk, O. V. Dolgov, and A. A. Golubov, "Self-energy Effect of Superconducting Energy Gap in Point-Contact Spectra of MgB2." E-mail yanson@ilt.kharkov.ua; preprint also available at http://arXiv.org/abs/cond-mat/0310577.

Y. Zhao, M. Ionescu, J. Horvat, and S. X. Dou, "Comparative study of in situ and ex situ MgB2 films deposited by pulsed laser deposition." E-mail yz70@uow.edu.au; preprint also available at http://arXiv.org/abs/cond-mat/0311556.

Y. Zhao, M. Ionescu, J. Horvat, A. H. Li, and S. X. Dou, "Si doping on MgB2 thin films by pulsed laser deposition." E-mail yz70@uow.edu.au; preprint also available at http://arXiv.org/abs/cond-mat/0311055.

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December 2003 Preprints

V. A. Drozd, A. M. Gabovich, P. Gierlowski, M. Pekala, and H. Szymczak, "Transport properties of bulk and thin-film MgB2 superconductors: effects of preparation conditions." To be published in Physica C (in press). Department of Chemistry, Kiev State University, 64 Volodymyrs'ka St. 01033 Kiev, Ukraine; tel. 380 44 2393306; e-mail vdrozd@univ.kiev.ua. Key words: MgB2, superconductivity, electrical resistivity, thermopower. 74.25; 74.62; 74.70; 74.76.

Minyi Fu, Xiaofeng Xu, Zhengkuan Jiao, H. Kumakura, K. Togano, Liren Ding, Futang Wang, and Jinglin Chen, "Minimum quench energy and normal zone propagation velocity in MgB2 superconducting tape." To be published in Physica C (in press). Department of Physics, Zhejiang University, Hangzhou 310027, China; tel. 86 571 8795 1327; fax 86 571 8795 1913; e-mail myfu@css.zju.edu.cn. Key words: MgB2 tape, minimum quench energy, normal zone propagation velocity. 74.70.Ad; 85.25.Kx.

A. Agliolo Gallitto, G. Bonsignore, S. Fricano, M. Guccione, and M. Li Vigni, "Microwave Response of Ceramic MgB2 Samples." Chapter review in "Progress in Superconductivity Research", Ed. Frank Columbus, Nova Science Publishers, New York (2003). E-mail agliolo@fisica.unipa.it; preprint also available at http://arXiv.org/abs/cond-mat/0312069.

T. Masui, S. Lee, and S. Tajima, "Carbon-substitution effect on the electronic properties of MgB2 single crystals." E-mail masui@istec.or.jp; preprint also available at http://arXiv.org/abs/cond-mat/0312458.

Todor M. Mishonov, Valery L. Pokrovsky, and Hongduo Wei, "Two-band BCS model describes well the thermodynamics of MgB2." Hongduo Wei's e-mail hwei@physics.tamu.edu; preprint also available at http://arXiv.org/abs/cond-mat/0312210.

E. Ohmichi, T. Masui, S. Lee, S. Tajima, and T. Osada, "Enhancement of the irreversibility field by carbon substitution in single crystal MgB2." E-mail ohmichi@issp.u-tokyo.ac.jp; preprint also available at http://arXiv.org/abs/cond-mat/0312348.

M. Pissas, D. Stamopoulos, S. Lee, and S. Tajima, "Influence of carbon doping in the vortex matter properties of MgB2." E-mail pissas@ath.forthnet.gr; preprint also available at http://arXiv.org/abs/cond-mat/0312350.

R. H. T. Wilke, S. L. Bud'ko, P. C. Canfield, D. K. Finnemore, Raymond J. Suplinskas, S. T. Hannahs, "Systematic effects of carbon doping on the superconducting properties of Mg(B{1-x}Cx)2." S. L. Bud'ko's e-mail budko@ameslab.gov; preprint also available at http://arXiv.org/abs/cond-mat/0312235.

Kh. A. Ziq, "Scaling of Vortex Flux Pinning with the Thermodynamic Critical Field in MgB2 Superconductor." Submitted to Superconductor Science and Technology. E-mail: kaziq@kfupm.edu.sa. Key words: Flux pinning, reversible magnetization, scaling behavior. 74.25.Op, 74.25.Qt, 74.25.Sv.

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