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

NAVIGATION BAR

(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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