HIGH-Tc UPDATE E-MAIL VERSION, VOL. 14, NO. 6, March 15, 2000.
<p>
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 <hr>
<p>
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<p>
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<p>
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 <hr>
<p>
<p>
 NOTA BENE:
<p>
<p>
 Pairing Symmetry in Electron-Doped Cuprates
<p>
 The experimental evidence for d-wave pairing symmetry in the hole-doped
 cuprate superconductors is by now overwhelming. On the other hand, the
 existing data for the electron-doped superconductors have been
 interpreted as being consistent with s-wave pairing. Three preprints
 listed in this issue, however, now tell a different story. All three
 papers present strong experimental evidence in support of d-wave pairing
 symmetry for two of the electron-doped superconductors, Nd2-xCexCuO4-d
 (NCCO) and Pr2-xCexCuO4-d (PCCO).
<p>
 Microwave-cavity-perturbation measurements of the temperature dependence
 of the penetration depth lambda(T) and conductivity sigma(T) of PCCO and
 NCCO crystals as well as parallel-plate-resonator measurements of
 lambda(T) in PCCO thin films have been carried out by J. D. Kokales et
 al. (Maryland). The authors found that lambda(T) has a power-law
 behavior for T < Tc/3, indicating the presence of line nodes in the
 superconducting gap and suggesting d-wave pairing symmetry. The authors
 also explain how paramagnetism due to rare-earth ions could have
 corrupted earlier data and led to an erroneous interpretation in terms
 of s-wave pairing. The authors also measured the real part of the
 conductivity and found it to be similar to that in the hole-doped
 cuprates.
<p>
 A preprint by R. Prozorov (Illinois, Urbana-Champaign) et al. reports
 measurements of the in-plane magnetic penetration depth lambda(T) in
 single crystals of PCCO and NCCO using a tunnel-diode rf resonator. The
 authors found that in PCCO, lambda(T) exhibits a power-law variation
 from T/Tc = 0.025 up to 0.5. In NCCO, however, lambda(T) was found to
 be nonmonotonic, with a minimum at ~4 K and a pronounced upturn at lower
 temperatures due to the paramagnetic contribution of Nd^[3+] ions.
 These experiments also imply the presence of line nodes in the
 superconducting order parameter of electron-doped superconducting
 cuprates.
<p>
 Phase-sensitive evidence that the electron-doped cuprates NCCO and PCCO
 have d-wave pairing symmetry has been found by C. C. Tsuei and J. R.
 Kirtley (IBM Yorktown). Using a scanning SQUID microscope, the authors
 observed a half flux quantum phi_0/2 = hc/4e in c-axis-oriented films of
 NCCO and PCCO epitaxially grown on tricrystal [100] SrTiO3 substrates
 designed to be frustrated for a d_[x^2-y^2] order parameter. Deposition
 of the superconducting film on the substrate produces three grain
 boundaries extending outward from the tricrystal point. The frustrated
 configuration produces either three pi-junctions or one pi-junction and
 two 0-junctions. In either case, spontaneous Josephson currents across
 the grain boundaries always generate half flux quanta of magnitude
 phi_0/2 (but of either sign), which are pinned to the tricrystal point
 by symmetry. The authors found that samples with two other
 configurations, designed to be unfrustrated for a d-wave superconductor,
 did not show the half-flux-quantum effect. The results show that both
 NCCO and PCCO have d-wave pairing symmetry.
<p>
<p>
 RBa2Cu3O7-d
<p>
 Remarkably high trapped magnetic fields have been achieved by G. Fuchs
 et al. (IFW-Dresden) in zinc-doped, bulk melt-textured YBa2Cu3O7-d
 (YBCO) showing a pronounced peak effect in the field dependence of the
 critical current density. Trapped fields up to 1.1 T were found at 77 K
 at the surface of a YBCO disk (diameter 26 mm and height 12 mm). Very
 high trapped fields up to 14.35 T were achieved at 22.5 K in the gap
 between a YBCO disk pair (diameter 26 mm and height 24 mm) containing
 silver additions and fitted with girdles of stainless steel. The YBCO
 cracked when an attempt was made to trap a higher magnetic field at a
 lower temperature.
<p>
 As reported by E. Mendoza et al. (Barcelona), a strong increase of the
 critical current density of YBCO melt-textured composites has been
 observed by adding Ag2O particles to the precursor mixture while the
 concentration of Y2BaCuO5 (Y-211) precipitates remained constant.
 Critical current density enhancements as high as 200% at 5 K [Jc^[ab](5
 K, 0 T) ~ 2.5 x 10^6 A/cm^2] and 1000% at 77 K and 2 T [Jc^[ab](77 K, 2
 T) ~ 2.2 x 10^4 A/cm^2 for H || c] were reached in samples with 20 wt%
 of Ag2O. Critical current measurements at 77 K for H || ab also
 revealed Jc enhancements by 100% at 0 T and 140% at 2 T. Using scanning
 electron microscopy, the authors found that the improvement of the
 critical currents in the YBCO-Ag melt-textured composites is correlated
 with the reduction in the density of microcracks parallel to the ab
 plane.
<p>
 Large-area high-resolution transmission electron microscopy (LA-HRTEM),
 which can image lattice defects over an area as wide as 20 micrometers x
 20 micrometers, has been used by H. Suematsu (Tokyo Tech) et al. to
 investigate twin boundaries and their spacing d_[tw] in melt-grown YBCO
 exhibiting the peak effect. The authors found the strongest peak effect
 in samples with the shortest d_[tw], and they found that a sample with
 the shortest d_[tw] had the widest oxygen-depleted regions near the twin
 boundaries. The authors thus suggest that the peak effect in melt-grown
 YBCO may be due to twin-boundary-induced oxygen modulation.
<p>
 Measurements of critical current densities and trapped fields in melt-
 grown (Nd,Eu,Gd)Ba2Cu3O7-d (NEG-123) containing sub-micron
 (Nd,Eu,Gd)2BaCuO5 (NEG-211) particles are reported in two preprints by
 M. Muralidhar et al. (SRL-ISTEC). The authors found that an NEG-123
 sample containing 10 mol% NEG-211 with additions of both CeO2 and Pt
 exhibited an enhanced fishtail effect with a critical current density
 Jc(77 K, 3 T) = 7.4 x 10^4 A/cm^2 for H || c.
<p>
 A preprint by C.-J. Kim (KAERI) et al. reports an investigation of the
 melting and resolidification of Sm1.8Ba2.4Cu3.4Ox in the Ba-Cu-O melt.
 The experiments were carried out to explain why SmBa2Cu3O7-d (Sm-123)
 seeds used for top-seeded melt growth of Y-123 have been observed to
 melt during processing even at temperatures below the melting point of
 Sm-123.
<p>
<p>
 Bi Cuprates
<p>
 The influence of neutron irradiation on the superconducting properties
 of Bi2Sr2Ca2Cu3O10+d (Bi-2223) tapes containing different amounts of
 [235]^U has been studied by S. Toenies (TU-Vienna) et al. Irradiation
 by thermal neutrons causes fission of uranium nuclei into two fission
 fragments, which create fission tracks (columnar defects) in the sample,
 whereas irradiation by fast neutrons produces spherical cascade defects.
 The authors found that thermal neutron irradiation enhances the critical
 current densities at higher fields, reduces the Jc anisotropy, and
 shifts the irreversibility line to higher fields.
<p>
 Intrinsic tunneling measurements on a series of Bi2Sr2CaCu2O8+d (Bi-
 2212) single crystals near optimal doping have been carried out by P.
 Mueller (Erlangen) et al. For slightly overdoped samples, the authors
 found that the superconducting gap remains finite at Tc and that it
 continuously evolves into the pseudogap structure. The same behavior
 was observed in external magnetic fields above H_[c2]. For optimally or
 slightly underdoped samples, however, the authors found that the
 superconducting gap closes completely at Tc and coexists with the
 pseudogap below Tc. The results suggest that the superconducting gap
 and the pseudogap have different origins.
<p>
<p>
 Sr2RuO4
<p>
 The diffracted neutron scattering intensities from the square magnetic
 flux lattice in the perovskite superconductor Sr2RuO4, which is thought
 to exhibit p-wave pairing with a two-component order parameter, have
 been measured by P. G. Kealey (Birmingham) et al. The relative
 intensities of the different flux-lattice Bragg reflections over a wide
 range of field and temperature are inconsistent with a single-component
 Ginzburg-Landau theory, but they qualitatively agree with a two-
 component p-wave Ginzburg-Landau theory.
<p>
 A preprint by K. Halterman and O. T. Valls (Minnesota) considers the
 Maxwell-London electrodynamics of three-dimensional superconductors in
 p-wave pairing states with nodal points or lines in the energy gap. The
 authors find that the current-velocity relation is then nonlinear in the
 applied field: cubic for point nodes and quadratic for lines. The
 authors obtain explicit angular and depth-dependent expressions for
 measurable quantities such as the transverse magnetic moment and the
 associated torque. The dependencies are different for point and line
 nodes and thus can be used to distinguish between different order
 parameters.
<p>
<p>
 Other Cuprates
<p>
 Muon spin relaxation (muSR) and low-field ac susceptibility measurements
 in a series of high-quality samples of La2-xSrxCuO4 (x = 0.08-0.24) as a
 function of temperature have been carried out by C. Panagopoulos (IRC-
 Cambridge) et al. The authors found that superconductivity coexists
 with low-temperature spin-glass order up to the optimally doped region
 where the normal-state pseudogap also closes. The systematic depletion
 of the superfluid density with underdoping, while antiferromagnetic
 correlations are increasing, indicates competition, rather than
 cooperation, between antiferromagnetic correlations and
 superconductivity.
<p>
 As reported by F. Cordero (Roma) et al., an increase of the acoustic
 absorption upon cooling has been found in La2-xSrxCuO4 (x = 0.019, 0.03,
 and 0.06) close to the temperatures at which freezing of the spin
 fluctuations in antiferromagnetically correlated clusters is expected to
 occur. The authors attribute the acoustic absorption to changes in the
 sizes of the quasi-frozen clusters induced by the vibration stress
 through magnetoelastic coupling.
<p>
 Polycrystalline samples of the electron-doped high-Tc superconductor
 Pr1.85Ce0.15CuO4-y have been prepared by A. Conceicao et al. (Sao Paulo)
 using different starting materials: (a) a mixture of simple oxides
 Pr6O11, CeO2, and CuO, (b) a mixture of the oxides Pr6O11 and CuO, and
 an intermediate compound PrCeO2, and (c) a sol-gel precursor.
 Structural, transport, and magnetic measurements revealed that complete
 diffusion of Ce into Pr2CuO4-y occurred only in samples prepared using a
 sol-gel precursor.
<p>
 A study of the influence of oxygen nonstoichiometry and hole
 distribution upon the irreversibility line H_[irr](T) in multilayered
 copper oxides has been carried out by M. Karppinen (Tokyo Tech and
 Helsinki University of Technology) et al. The authors conclude that the
 enhancement of the H_[irr] characteristics with increasing oxygen
 content is due not to the increase in the oxygen content itself nor to
 the resulting shrinkage of the nonsuperconductive blocking blocks, but
 instead is attributable to the hole concentrations in both the
 superconductive and nonsuperconductive blocks of the multilayered
 structure. The authors suggest that structures with a more homogeneous
 hole distribution along the stacking direction show higher
 irreversibility lines (H_[irr] vs T/Tc), even though such a hole
 distribution works against optimizing Tc.
<p>
 Nearly single-phase superconducting (Tl1-xHgx)2Sr2Ca2Cu3Oy samples have
 been prepared by E. Kandyel et al. (SRL-ISTEC) using high pressures.
 As-prepared samples with x = 0.35 and 0.65 and optimally nominal oxygen
 contents were found to be overdoped, showing Tc = 103 K and 80 K,
 respectively. Reducing treatments in Ar/H2 were found to increase Tc up
 to 116 K and 118 K, respectively, in the two compounds.
<p>
<p>
 Films
<p>
 A two-layer process for depositing biaxially textured Tl-based cuprates
 via electrodeposition (ED) on Ag-coated, single-crystal substrates is
 reported in a preprint by R. N. Bhattacharya (NREL) et al. Pole-figure
 measurements of two-layer, electrodeposited (Tl,Bi)-(Sr,Ba)-Ca-Cu-O
 [(Tl,Bi)-1223] films on 300 Angstroms Ag/LaAlO3 showed strong biaxial
 texturing. The omega and phi scans of 1.6 micrometers
 (Ti,Bi)0.9Sr1.6Ba0.4Ca2Cu3Ag0.2Ox films showed a full width at half
 maximum (FWHM) of only 0.92 degrees and 0.6 degrees, respectively,
 indicating a film of very high quality. Transport measurements for
 these films showed values of Tc ~~ 110 K and Jc > 10^6 A/cm^2 at 77 K in
 zero field. The authors conclude that ED processing of Tl-based oxide
 superconductors deserves more attention as a viable candidate for the
 production of high-temperature superconducting tape operating near 77 K.
<p>
 A preprint by D. P. Almond (Bath) et al. reports that modulated optical
 reflectance (MOR) is a convenient, room-temperature, noncontact,
 nondestructive, and high-spatial-resolution means of assessing the
 quality of high-temperature-superconducting (HTS) thin films. Room-
 temperature MOR characterizations of a number of 8 GHz planar HTS
 resonators indicating a range of property variations and local
 degradations in HTS film performance were found to be consistent with
 results obtained at low temperatures by the electron-beam-induced
 voltage-contrast technique. The microwave performance of some of the
 resonators exhibited nonlinear characteristics that can be explained by
 HTS defects revealed by the MOR technique.
<p>
<p>
 Applications
<p>
 As noted in a preprint by B. H. Moeckly and Y. M. Zhang (Conductus),
 SrTiO3 (STO) thin films are promising for a variety of applications
 requiring tunability. The preprint describes the growth and
 characterization of STO thin films including their dielectric
 properties. The authors also present attempts at reducing the loss
 tangent of these films, and they discuss the integration of STO films
 with HTS microwave filters for trimming purposes.
<p>
 A preprint by T. W. Clinton and M. Johnson (NRL) reports that a bilayer
 ferromagnetic film, consisting of soft and hard magnetic layers
 separated by a nonmagnetic layer, has been incorporated into a
 magnetoquenched superconducting valve, making it possible to control the
 valve with uniaxial magnetic fields. The authors demonstrated device
 switching with fields as small as 20 Oe. The switch is inherently
 nonvolatile, has linear output characteristics, and requires a single
 inductively coupled "write wire" for integrated operation, all of which
 make it promising for application as a storage cell in a high-density
 superconducting random access memory.
<p>
 Electrical machines having rotors constructed from different numbers of
 type-II superconducting segments are modeled in a preprint by G. J.
 Barnes et al. (Oxford). The authors compute the torque when hollow
 cylindrical rotors are subjected to a rotating applied field that
 induces currents in the superconducting pieces. Using the critical
 state model and the finite-element method, the authors solve numerically
 for the resulting current and field distributions. The results indicate
 the number of segments that will result in the largest torque for a
 given rotor size, critical current density, and applied field amplitude.
<p>
 The 43 Hz ac losses in multifilamentary AgAu(10 wt%)/Bi-2223 tapes with
 filaments twisted at different pitches have been measured by E. Martinez
 (Southampton) et al. in perpendicular ac fields at 77 K. Using
 simultaneous measurements of the first and higher harmonics of the
 voltage induced in the pickup coil, the authors separated the main loss
 contributions (superconductor and coupling-current losses). The authors
 found that a very small pitch (< 5 mm) is necessary for a considerably
 lower loss than that of the untwisted tapes. The authors also analyze
 the dependence of the coupling field and coupling current losses upon
 the twist pitch, and they compare the results with theoretical
 predictions.
<p>
<p>
 Vortices
<p>
 A detailed, quantitative study of the Josephson coupling energy in the
 vortex-liquid, Bragg-glass, and vortex-glass phases of Bi-2212 has been
 carried out by M. B. Gaifullin (ISSP-Tokyo and CREST) et al. using the
 Josephson plasma resonance. The measurements revealed distinct features
 in the T- and H- dependencies of the plasma frequency omega_[pl] for
 each of these three vortex phases. The authors found that omega_[pl]
 shows a dramatic change when going across either the Bragg-glass to
 vortex-glass or the Bragg-glass to vortex-liquid transition line. The
 authors provide a quantitative discussion of the properties of these
 phase transitions, including the first-order nature of the transition
 from the Bragg glass to the vortex glass.
<p>
 The Josephson plasma resonance in underdoped Bi-2212 single crystals has
 been observed by I. Kakeya et al. (Tsukuba) when a magnetic field is
 applied nearly parallel to the ab plane. The resonance mode splits into
 two branches at higher and lower temperatures, and a definite gap
 appears in the temperature region between them. As the field is tilted
 away from the ab plane, the branches gradually merge into a single mode,
 which is a continuation of the mode when the field is applied along the
 c axis.
<p>
 A vortex-glass transition due to point disorder existing on the
 superconducting layers in layered superconductors has been studied by R.
 Ikeda and H. Adachi (Kyoto) for an applied magnetic field parallel to
 the layers. The authors' calculation of tilt responses indicates that,
 irrespective of the magnitude of the field, the resulting Josephson-
 vortex-glass phase should have a transverse Meissner effect only for a
 tilt perpendicular to the layers, just as in the case of a planar
 splayed-glass phase.
<p>
 The behavior of the B vs H constitutive relation near H_[c1] in
 disordered type-II superconductors has been calculated by R. A. Lehrer
 and D. R. Nelson (Harvard). The authors stress that the Abrikosov
 result, B proportional to [ln(H - H_[c1])]^[-2], which is valid in the
 absence of disorder and thermal fluctuations, changes significantly in
 the presence of disorder. The authors present new expressions for B vs
 H for various types of quenched disorder in two- and three-dimensional
 superconductors.
<p>
 An approach to calculate the attractive long-range vortex-vortex
 interaction of the van der Waals type present in anisotropic and layered
 superconductors has been developed by H. P. Buechler (ETH-Zurich) et al.
 The mapping of the statistical mechanics of two-dimensional charged
 bosons allows for the definition of a Casimir problem: Two half spaces
 of vortex matter separated by a gap are mapped to two dielectric half
 planes of charged bosons interacting via a massive gauge field. The
 authors determine the attractive Casimir force between the two half
 planes and show that it agrees with the pairwise summation of the van
 der Waals forces between vortices.
<p>
 The magnetic field generated by a vortex in an anisotropic layered
 superconducting film of finite thickness has been calculated by E.
 Sardella (Bauru). The film surfaces are assumed to be parallel to the
 bc face of the crystal, and the axis of the vortex line is assumed to be
 along the a axis, parallel to the superconducting planes and
 perpendicular to the film surface.
<p>
 The influence of defects on the Bean-Livingston surface energy barrier
 has been investigated by A. Yu. Aladyshkin et al. (Nizhny Novgorod).
 The authors find that surface imperfections can result in a decrease of
 the critical field H* of the first vortex entry into a superconductor,
 and they present results for vortex nucleation near a wedge-like crack.
<p>
 Molecular dynamics simulations of driven vortices in highly anisotropic
 layered superconductors in the presence of an external homogeneous force
 and point disorder have been carried out by A. B. Kolton (Bariloche) et
 al. The authors found that just above the critical current, in the
 plastic-flow regime, 2D pancake vortices are completely uncorrelated in
 the c direction. However, as the current increases, there is an onset
 of correlation along the c axis at a transition, coinciding with a peak
 in the differential resistance, from plastic flow to a moving smectic
 phase.
<p>
 A preprint by R. P. Huebener (Tuebingen) et al. reports that at
 intermediate fields B_[c1] << B < B_[c2] and at temperatures T << Tc,
 the flux-flow resistance of the cuprate superconductor Nd2-xCexCuOy
 (NCCO) displays two intrinsic steps as a function of the electric field.
 To explain this strongly nonlinear behavior, the authors propose a
 scenario based on two subbands between the Fermi energy and the gap
 energy, leading to Bloch oscillations and Zener breakdown for
 quasiparticle dynamics. The subbands originate from the Andreev bound
 states in the core of an isolated vortex and the interaction between
 vortices. The authors note that the proposed scenario appears to
 explain the observed magnetic field and temperature dependence of the
 flux-flow resistance steps.
<p>
 As stressed in a preprint by E. Goldobin (Juelich) et al., a Josephson
 vortex moving at a high velocity parallel to the layers of a Josephson
 multilayer (e.g., a high-temperature superconductor such as Bi-2212) can
 emit electromagnetic waves (Cherenkov radiation), which can lead to the
 formation of novel stable dynamic states consisting of several bunched
 vortices of the same polarity. The authors find such bunched states in
 numerical simulations of two and three coupled junctions. At a given
 driving current, several bunched states are stable and move at
 velocities that are higher than the single-vortex velocity.
<p>
<p>
 Theory
<p>
 As emphasized in a preprint by D. Pines (Los Alamos and Illinois), the
 major challenge in understanding the cuprate superconductors has been
 determining the evolution with doping and temperature of their anomalous
 normal-state behavior. Key to this understanding is the experimentally
 determined magnetic phase diagram for the cuprates, which provides
 information on the protected magnetic properties of the normal state,
 i.e., generic behavior that is reliably the same from one system to the
 next, regardless of details. The author discusses the constraints this
 places on candidate quantum protectorates [Luttinger liquids, nearly
 antiferromagnetic Fermi liquids, nearly charge-ordered Fermi liquids,
 mesoscopically ordered phases (stripes), and quantum critical behavior],
 and he presents the case for one of these, the nearly antiferromagnetic
 Fermi liquid.
<p>
 The doping dependence of the strong antiferromagnetic spin fluctuations
 in the cuprate superconductors is considered in a preprint by D. K. Morr
 (Illinois, Urbana-Champaign) et al. The authors conclude that a single
 theoretical scenario can describe both inelastic neutron scattering
 (INS) experiments and nuclear magnetic resonance (NMR) experiments if
 one assumes spatially inhomogeneous but locally commensurate spin
 correlations.
<p>
 A preprint by S. Saito (Waseda) et al. have used the extended attractive
 Hubbard model to perform a variational analysis on the evolution of
 superconductivity from the weak to the strong coupling regime. In
 contrast to a crossover without a thermodynamic anomaly found in a
 dilute system, the authors find a quantum phase transition, driven by
 charge-density-wave instabilities, near half filling.
<p>
 A preprint by J. Bouvier and J. Bok (Paris) points out that underdoped
 cuprates are disordered materials with diffusion coefficients as low as
 10^[-5] m^2s^[-1]. Under these conditions, the Coulomb interaction
 between electrons must be taken into account, the main effect being to
 open a gap in the density of states near the Fermi level. The authors
 find that this model explains most of the observed features of the
 pseudogap in the normal state, including its magnitude, anisotropy, and
 variation with doping.
<p>
 The spectral properties of the underdoped cuprates are described by L.
 Benfatto et al. (Roma) as resulting from a momentum-dependent pseudogap
 in the normal-state spectrum. The authors assert that such a model
 accounts, within a BCS approach, for the doping dependence of the
 critical temperature and the two-parameter leading-edge shift observed
 in the cuprates.
<p>
 The effect of magnetic fields on pseudogap phenomena in the high-Tc
 cuprates has been theoretically investigated by Y. Yanase and K. Yamada
 (Kyoto). The authors can explain high-magnetic-field NMR experiments
 from underdoped to overdoped cuprates, as well as the behavior of the
 in-plane resistivity, the Hall coefficient, and the c-axis resistivity
 in the pseudogap phase.
<p>
 The quasiparticle energy spectrum in clean ferromagnetic weak links
 between conventional superconductors has been calculated by L.
 Dobrosavljevic-Grujic et al. (Belgrade). Large peaks in the density of
 states, due to a special case of Andreev reflection at the ferromagnetic
 barrier, correspond to spin-split bound states. The authors obtain the
 energies of these states as a function of the barrier thickness,
 exchange-field strength, and the macroscopic phase difference phi at the
 link. In the ground state, phi can be 0 or pi, depending upon the
 influence of the ferromagnetic barrier.
<p>
 Macroscopic quantum tunneling of the magnetic moment in a single-domain
 particle placed above the surface of a superconductor has been studied
 by E. M. Chudnovsky (CUNY) and J. R. Friedman (SUNY-Stony Brook). Such
 a setup allows one to manipulate the height of the energy barrier while
 preserving the degeneracy of the ground state. The authors compute the
 tunneling amplitude and the effect of dissipation in the superconductor.
<p>
<p>
 Overviews
<p>
 As noted in a review by T. Tohyama and S. Maekawa (Tohoku), angle-
 resolved photoemission spectroscopy (ARPES) has been developed rapidly
 over the last decade, with improvements in the energy and momentum
 resolution. ARPES is now the most powerful technique for investigating
 the high-Tc cuprate superconductors. The authors review recent ARPES
 data on the cuprates from a theoretical point of view, with emphasis on
 the systematic evolution of the spectral weight near the momentum (pi,0)
 from insulator to overdoped systems. The authors also review the
 effects of charge stripes on the ARPES spectra and discuss recent
 experimental and theoretical efforts to understand the superconducting
 state and the pseudogap phenomenon (145 refs.).
<p>
 Flux pinning in 123-type high-Tc superconductors has been reviewed by M.
 R. Koblischka et al. (SRL-ISTEC). The authors first discuss the various
 pinning sites found in high-Tc superconductors, their interactions with
 vortices, and their effect on magnetization curves. Next, they discuss
 the scaling of pinning forces and compare the behavior in the cuprates
 with that in conventional superconductors. The authors summarize their
 results in the form of a pinning-force diagram for bulk high-Tc
 superconductors. The authors conclude that (a) the pinning mechanism
 that produces the peak in Jc vs H_a is dTc pinning, and (b) the ideal
 pinning center for high-Tc materials at ~77 K is a superconducting one
 that provides a scatter in Tc (83 refs.).
<p>
 Selected problems of fundamental importance for spintronics and spin-
 polarized transport, some of them with a special emphasis on their
 applications in quantum computing and coherent control of quantum
 dynamics, are reviewed in a preprint by S. Das Sarma et al. (Maryland).
 The authors discuss a specific example of a magnetic
 semiconductor/superconductor interface, which displays many intricacies
 introduced by a complex spin-dependent interface in spin-polarized
 transport. The authors propose that pairs of entangled electrons in a
 superconductor (Cooper pairs) can be transferred to a nonsuperconducting
 region and subsequently separated for a transport study of the spin
 entanglement (49 refs.).
<p>
 A paper by M. Daeumling (NKT) et al. summarizes the authors'
 investigations of ac losses in the current generation of power cables
 consisting of successive layers of helically wound superconducting Bi-
 2223 tapes. The authors discuss ac losses in superconducting tapes, the
 distribution of currents and fields in power cables, and measurement
 methods and results (42 refs.).
<p>
 As noted in a brief overview by B. H. Moeckly (Conductus), HTS
 interface-engineered Josephson junctions have generated interest because
 of their excellent stability and uniformity compared with the results of
 other HTS junction technologies. The author presents a concise summary
 of some of the main results and then discusses the problems that must be
 overcome to realize HTS digital circuit applications (7 refs.).
<p>
<p>
 Contributed by John R. Clem
 <hr>
<p>
 Contents: Preprints begin on page 6 and Coming Events are on page 13.
<p>
 High-Tc Update is available without charge to interested persons.
 Recipients are expected to participate in this information exchange by
 sending us preprints, reprints, meeting news, research news, etc.
 Contributions to defray the cost of newsletter processing and mailing
 are welcome.
 <hr>
<p>
 PREPRINTS
 To obtain a particular preprint, contact the first author at the address
 given at the end of the citation. Help us expand this list by sending
 us your complete preprint. Please specify where and when your paper was
 submitted. An * next to an entry indicates it is a correction or
 revision of a previous entry. PACS codes and/or key words are given at
 the end of the citation.
<p>
 A. Yu. Aladyshkin, A. S. Mel'nikov, I. A. Shereshevsky, and I. D.
 Tokman, "Influence of Surface Irregularities on Barriers for Vortex
 Entry in Type-II Superconductors." Institute for Physics of
 Microstructures, Russian Academy of Sciences, Nizhny Novgorod 603600,
 GSP-105, RUSSIA; preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911430">http://xxx.lanl.gov/abs/cond-mat/9911430.</a>
<p>
 J. A. Alarco, J. D. Riches, and J. C. Barry, "Observation of Exsolution
 Textures Within Ba-Cu-O-Rich Solidified Melts of Y-Ba-Cu-O Materials and
 Their Relationship to Y123 Nucleation and Texturing." To be published
 in Physica C (in press). Centre for Microscopy and Microanalysis, The
 University of Queensland, Queensland 4072, AUSTRALIA; telephone +61 7
 3365 4045; telefax + 61 7 3365 4422; e-mail <a href="mailto:j.alarco@mailbox.uq.edu.au">j.alarco@mailbox.uq.edu.au.</a>
 Key words: Y-Ba-Cu-O, phase diagram, solidification, melt processing.
 74.72.Bk; 81.30.-t; 81.10.-h.
<p>
 D. P. Almond, P. Nokrach, E.W.R. Stokes, A. Porch, S.A.L. Foulds, F.
 Wellhoefer, J. R. Powell, and J. S. Abell, "Modulated Optical
 Reflectance Characterization of High Temperature Superconducting Thin
 Film Microwave Devices." To be published in J. Appl. Phys. Department
 of Materials Science and Engineering, University of Bath, Bath BA2 7AY,
 UNITED KINGDOM; telephone +44 1225 826826; telefax +44 1225 826098.
<p>
 G. J. Barnes, M. D. McCulloch, and D. Dew-Hughes, "Torque from
 Hysteresis Machines with Type-II Superconducting Segmented Rotors." To
 be published in Physica C (in press). Department of Engineering
 Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UNITED
 KINGDOM; telephone +44 1865 273001; telefax +44 1865 273010; e-mail
 <a href="mailto:gary.barnes@eng.ox.ac.uk">gary.barnes@eng.ox.ac.uk.</a> Key words: HTS, motor, hysteresis,
 simulation. 74.60.-w; 74.25.Ha; 07.05.-t.
<p>
 Pieder Beeli, "Impedance Mismatch: A New Length Scale in the
 Electrodynamics of a Superconductor-Metal System." To be published in
 Physica C (in press). Department of Physics, Colorado State University,
 Fort Collins, CO 80521; telephone (970) 491-5289; telefax (970) 491-
 7947; e-mail <a href="mailto:pbeeli@lamar.colostate.edu">pbeeli@lamar.colostate.edu.</a> Key words: impedance
 mismatch, superconducting film, length scale, bilayer.
<p>
 L. Benfatto, S. Caprara, and C. Di Castro, "A Model for Gap and
 Pseudogap Evolution in High-Tc Superconductors." Dipartimento di
 Fisica, Universita di Roma "La Sapienza" and Istituto Nazionale per la
 Fisica della Materia, Unita di Roma 1, Piazzale Aldo Moro 5, I-00185
 Rome, ITALY; e-mail <a href="mailto:Lara.Benfatto@roma1.infn.it">Lara.Benfatto@roma1.infn.it;</a> preprint also available
 at <a href="http://xxx.lanl.gov/abs/cond-mat/0002250">http://xxx.lanl.gov/abs/cond-mat/0002250.</a> 74.25.Dw; 71.10.Hf;
 74.20.Fg.
<p>
 R. N. Bhattacharya, H. L. Wu, Y.-T. Wang, R. D. Blaugher, S. X. Yang, D.
 Z. Wang, Z. F. Ren, Y. Tu, D. T. Verebelyi, and D. K. Christen,
 "Improved Electrodeposition Process for the Preparation of
 Superconducting Thallium Oxide Films." To be published in Physica C (in
 press). National Renewable Energy Laboratory, 1617 Cole Boulevard,
 Golden, CO 80401-3393; telephone (303) 384-6477; telefax (303) 384-6430;
 e-mail <a href="mailto:raghu_bhattacharya@nrel.gov">raghu_bhattacharya@nrel.gov.</a> Key words: thick film,
 electrodeposition, Tl-oxides.
<p>
 J. Bouvier and J. Bok, "Pseudogap in the Normal State of Cuprates." To
 be published in the Proc. of the 6th Int. Conf. on Mater. and Mech. of
 Supercond. and High Temp. Supercond. (M^2S-HTSC-VI), Houston, Tex., Feb.
 20-25, 2000. Laboratory of Statistical Physics, Ecole Superieure de
 Physique et Chimie Industrielles (ESPCI), 10 rue Vauquelin, F-75231
 Paris Cedex 05, FRANCE.
<p>
 H. P. Buechler, H. G. Katzgraber, and G. Blatter, "Casimir Force Between
 Two Half Spaces of Vortex Matter in Anisotropic Superconductors."
 Submitted to Physica C. Theoretische Physik, Eidgenoessische Technische
 Hochschule-Hoenggerberg, CH-8093 Zurich, SWITZERLAND; H. G. Katzgraber's
 e-mail at University of California at Santa Cruz
 <a href="mailto:dummkopf@debussy.ucsc.edu">dummkopf@debussy.ucsc.edu;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002183">http://xxx.lanl.gov/abs/cond-mat/0002183.</a>
<p>
 Eugene M. Chudnovsky and Jonathan R. Friedman, "Macroscopic Quantum
 Coherence in a Magnetic Nanoparticle Above the Surface of a
 Superconductor." Submitted to Phys. Rev. Lett. Department of Physics
 and Astronomy, CUNY Lehman College, 250 Bedford Park Boulevard West,
 Bronx, NY 10468-1589; Jonathan R. Friedman's e-mail
 <a href="mailto:jrf@warp.physics.sunysb.edu">jrf@warp.physics.sunysb.edu;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002255">http://xxx.lanl.gov/abs/cond-mat/0002255.</a> 75.45.+j; 75.50.Tt; 74.25.Nf.
<p>
 T. W. Clinton and Mark Johnson, "Magnetoquenched Superconducting Valve
 with Bilayer Ferromagnetic Film for Uniaxial Switching." To published
 in Appl. Phys. Lett. Seagate Technology, 2403 Sidney Street,
 Pittsburgh, PA 15203-2116; telephone (412) 918-7000; telefax (412) 918-
 7010; e-mail <a href="mailto:thomas_w_clinton@notes.seagate.com">thomas_w_clinton@notes.seagate.com.</a>
<p>
 A. Conceicao, C. H. Cohenca, and R. F. Jardim, "Structural, Transport,
 and Magnetic Properties of Pr1.85Ce0.15CuO4-y Prepared Through Different
 Precursors." To be published in Physica C. Contact R. F. Jardim,
 Instituto de Fisica, Universidade de Sao Paulo, C.P. 66318, 05315-970
 Sao Paulo, SP, BRAZIL; telephone +55 11 818-6891 or -6896; telefax +55
 11 818 6984; e-mail <a href="mailto:rjardim@if.usp.br">rjardim@if.usp.br.</a> Key words: electron-doped
 superconductors, sol-gel synthesis, x-ray powder diffraction, electrical
 resistivity, magnetization. 74.72.Jt; 74.80.Bj; 74.62.Bf.
<p>
 F. Cordero, R. Cantelli, A. Paolone, and M. Ferretti, "Observation of
 the Cluster Spin-Glass Phase in La2-xSrxCuO4 by Anelastic Spectroscopy."
 Submitted to Phys. Rev. B. Istituto di Acustica "O.M. Corbino," CNR,
 Area della Ricerca di Roma-Tor Vergata, Via del Fosso del Cavaliere 100,
 I-00133 Rome, ITALY; telephone +39 06 4993 4114; telefax +39 06 2066
 0061; e-mail <a href="mailto:cordero@idac.rm.cnr.it">cordero@idac.rm.cnr.it;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002009">http://xxx.lanl.gov/abs/cond-mat/0002009.</a>
<p>
 S. Das Sarma, Jaroslav Fabian, Xuedong Hu, and Igor Zutic, "Theoretical
 Perspectives on Spintronics and Spin-Polarized Transport." To be
 published in IEEE Trans. Magn. Department of Physics, University of
 Maryland, College Park, MD 20742-4111; e-mail <a href="mailto:dassarma@physics.umd.edu">dassarma@physics.umd.edu;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/0002256">http://xxx.lanl.gov/abs/cond-mat/0002256.</a>
 Key words: spintronics, spin-polarized transport, spin coherence, spin-
 hot-spot model, spin-based quantum computation, quantum information,
 spin entanglement, hybrid semiconductor structures, spin injection,
 Andreev reflection.
<p>
 M. Daeumling, S. Krueger Olsen, C. Traeholt, D.W.A. Willen, A. Kuehle,
 C. N. Rasmussen, C. Rasmussen, O. Tonnesen, and J. Ostergaard, "ac Loss
 in Superconducting Power Cables." To be published in Studies of High
 Temp. Supercond., Vol. 32, edited by A. Narlikar (Nova Science
 Publishers, New York). NKT Research Center, Priorparken 878, DK-2605
 Brondby, DENMARK.
<p>
 L. Dobrosavljevic-Grujic, R. Zikic, and Z. Radovic, "Quasiparticle
 Energy Spectrum in Ferromagnetic Josephson Weak Links." To be published
 in Physica C (in press). Institute of Physics, P.O. Box 57, 11080
 Belgrade, Serbia, YUGOSLAVIA; telephone +381 11 3162 758; telefax +381
 11 3162 190; e-mail <a href="mailto:dobrosav@phy.bg.ac.yu">dobrosav@phy.bg.ac.yu.</a> Key words: density of
 states, pi contact, zero-energy bound states, spin-polarized ground
 states. 74.50.+r.
<p>
 M. Eisterer and H. W. Weber, "Determination of the J(E) Characteristic
 by ac Measurements." To be published in Physica C. Atominstitut der
 Oesterreichischen Universitaeten, A-1020 Wien, AUSTRIA; H. W. Weber's e-
 mail <a href="mailto:weber@ati.ac.at">weber@ati.ac.at.</a>
<p>
 M. Eisterer, S. Toenies, H. W. Weber, R. Weinstein, R. Sawh, and Y. Ren,
 "High Critical Currents Due to Fission Tracks in YBa2Cu3O7-d." To be
 published in Physica C. Atominstitut der Oesterreichischen
 Universitaeten, A-1020 Wien, AUSTRIA; H. W. Weber's e-mail
 <a href="mailto:weber@ati.ac.at">weber@ati.ac.at.</a>
<p>
 T. Endo, M. Tada, K.-I. Itoh, J. Yamada, and H. Kohmoto, "Why Oxygen
 Molecule is More Effective on Crystal Growth of Nondoped Bi2201 Thin
 Films?" To be published in the Proc. of the Int. School on Crystal
 Growth Methods and Processes, Chennai, India, Jan. 24 - Feb. 4, 2000.
 Faculty of Engineering, Mie University, 1515 Kamihama, Tsu, Mie 514-
 8507, JAPAN; telephone +81 592 32 1211; telefax +81 592 31 9471; e-mail
 <a href="mailto:endo@cm.elec.mie-u.ac.jp">endo@cm.elec.mie-u.ac.jp.</a>
<p>
 T. Endo, M. Tada, and J. Yamada, "Why Oxygen Plasma is More Effective on
 Crystal Growth of Ca-Doped Bi2201 Thin Films?" To be published in the
 Proc. of the Intl. School on Crystal Growth Methods and Processes,
 Chennai, India, Jan. 24 - Feb. 4, 2000. Faculty of Engineering, Mie
 University, 1515 Kamihama, Tsu, Mie 514-8507, JAPAN; telephone +81 592
 32 1211; telefax +81 592 31 9471; e-mail <a href="mailto:endo@cm.elec.mie-u.ac.jp">endo@cm.elec.mie-u.ac.jp.</a>
<p>
 Hanno Essaen, "Circulating Electrons, Superconductivity, and the Darwin-
 Breit Interaction." Department of Mechanics, Royal Institute of
 Technology, SE-100 44 Stockholm, SWEDEN; e-mail <a href="mailto:hanno@mech.kth.se">hanno@mech.kth.se;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/0002096">http://xxx.lanl.gov/abs/cond-mat/0002096.</a>
 74.20.-z; 74.20.Hi.
<p>
 D. E. Feldman, "No Quasi-Long-Range Order in Strongly Disordered Vortex
 Glasses: A Rigorous Proof." Department of Condensed Matter Physics,
 Weizmann Institute of Science, Rehovot 76100, ISRAEL; e-mail
 <a href="mailto:feldman@figaro.weizmann.ac.il">feldman@figaro.weizmann.ac.il;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002109">http://xxx.lanl.gov/abs/cond-mat/0002109.</a>
<p>
 G. Fuchs, P. Schaetzle, G. Krabbes, S. Gruss, P. Verges, K.-H. Mueller,
 J. Fink, and L. Schultz, "Trapped Magnetic Fields Larger than 14 Tesla
 in Bulk YBa2Cu3O7-x." To be published in Appl. Phys. Lett. Institut
 fuer Festkoerper- und Werkstofforschung Dresden, Postfach 270016, D-
 01171 Dresden, GERMANY.
<p>
 M. B. Gaifullin, Yuji Matsuda, N. Chikumoto, J. Shimoyama, and K.
 Kishio, "Abrupt Change of Josephson Plasma Frequency at the Phase
 Boundary of the Bragg Glass in Bi2Sr2CaCu2O8+d." To be published in
 Phys. Rev. Lett. Contact Yuji Matsuda, Institute for Solid State
 Physics, University of Tokyo, Roppongi 7-22-1, Minato-ku, Tokyo 106,
 JAPAN; e-mail <a href="mailto:ym@issp.u-tokyo.ac.jp">ym@issp.u-tokyo.ac.jp;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002196">http://xxx.lanl.gov/abs/cond-mat/0002196.</a> 74.25.Nf; 74.50.+r; 74.60.Ec;
 74.72.Hs.
<p>
 E. Goldobin, B. A. Malomed, and A. V. Ustinov, "Bunching Fluxons by the
 Cherenkov Radiation in Josephson Multilayers." Submitted to Phys. Rev.
 B. Institute of Thin Film and Ion Technology, Research Center Juelich
 GmbH (FZJ), D-52425 Juelich, GERMANY; e-mail <a href="mailto:e.goldobin@fz-juelich.de">e.goldobin@fz-juelich.de;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/0002051">http://xxx.lanl.gov/abs/cond-mat/0002051.</a>
 74.50.+r; 74.80.Dm; 41.60.Bq.
<p>
 Klaus Halterman and Oriol T. Valls, "Nonlinear Electrodynamics of p-Wave
 Superconductors." Submitted to Phys. Rev. B. School of Physics and
 Astronomy and Minnesota Supercomputer Institute, University of
 Minnesota, Minneapolis, MN 55455-0149; e-mail
 <a href="mailto:khalter@physics.spa.umn.edu">khalter@physics.spa.umn.edu;</a> Oriol T. Valls' e-mail <a href="mailto:otvalls@tc.umn.edu">otvalls@tc.umn.edu.</a>
<p>
 R. P. Huebener, O. M. Stoll, A. Wehner, and M. Naito, "Flux-Flow
 Resistance in the Cuprate Superconductor Nd2-xCexCuOy: Subbands, Bloch
 Oscillations, and Zener Breakdown." To be published in Physica C.
 Physikalisches Institut, Lehrstuhl Experimentalphysik II, Universitaet
 Tuebingen, Morgenstelle 14, D-72076 Tuebingen, GERMANY. 74.25.Fy;
 74.60.Ge; 74.72.Jt.
<p>
 Ryusuke Ikeda and Hiroto Adachi, "Josephson-Vortex-Glass Transition in
 Strong Fields." Department of Physics, Kyoto University, Kyoto 606-
 8502, JAPAN; e-mail <a href="mailto:ikeda@ton.scphys.kyoto-u.ac.jp">ikeda@ton.scphys.kyoto-u.ac.jp.</a> Key words: type-II
 superconductors, vortex states, Josephson vortex, vortex-glass.
<p>
 Itsuhiro Kakeya, Tomoyuki Wada, Ryo Nakamura, and Kazuo Kadowaki,
 "Josephson Plasma Mode in Fields Parallel to Layers of Bi2Sr2CaCu2O8+d."
 Institute of Materials Science, University of Tsukuba, 1-1-1 Ten-nodai,
 Tsukuba, Ibaraki 305-8573, JAPAN.
<p>
 Itsuhiro Kakeya, Tomoyuki Wada, Ryo Nakamura, and Kazuo Kadowaki,
 "Josephson Plasma Resonance in Bi2Sr2CaCu2O8+d Under Parallel Magnetic
 Field." Presented at the Int. Conf. on Phys. and Chem. of Molecular and
 Oxide Supercond. (MOS'99), Stockholm, Sweden, July 28-Aug. 2, 1999.
 Institute of Materials Science, University of Tsukuba, 1-1-1 Ten-nodai,
 Tsukuba, Ibaraki 305-8573, JAPAN. 74.50.+r; 72.30.+q; 74.60.Ge.
<p>
 E. Kandyel, X.-J. Wu, and S. Tajima, "Annealing Effects on Structure and
 Superconductivity of (Tl1-xHgx)2Sr2Ca2Cu3Oy." To be published in J.
 Phys. Chem. Solids. Superconductivity Research Laboratory,
 International Superconductivity Technology Center (ISTEC), 10-13
 Shinonome 1-chome, Koto-ku, Tokyo 135-0062, JAPAN. Key words:
 superconductors, high pressure, superconductivity, crystal structure.
<p>
 M. Karppinen, H. Yamauchi, T. Nakane, and M. Kotiranta, "Oxygen Non-
 stoichiometry and Hole Distribution in Multilayered Copper Oxides:
 Understanding of the Magnetic-Irreversibility Characteristics." To be
 published in Physica C. Contact H. Yamauchi, Materials & Structures
 Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku,
 Yokohama 227, JAPAN; telephone +81 45 924-5315; telefax +81 45 924-5365
 or -5360; e-mail <a href="mailto:yamauchi@materia.titech.ac.jp">yamauchi@materia.titech.ac.jp.</a>
<p>
 P. G. Kealy, T. M. Riseman, E. M. Forgan, L. M. Galvin, A. P. Mackenzie,
 S. L. Lee, D. McK. Paul, R. Cubitt, D. F. Agterberg, R. Heeb, Z. Q. Mao,
 and Y. Maeno, "A Reconstruction from Small-Angle Neutron Scattering
 Measurements of the Real Space Magnetic Field Distribution in the Mixed
 State of Sr2RuO4." Submitted to Phys. Rev. Lett. School of Physics and
 Astronomy, University of Birmingham, Birmingham B15 2TT, UNITED KINGDOM;
 e-mail <a href="mailto:P.G.Kealey@bham.ac.uk">P.G.Kealey@bham.ac.uk;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002112">http://xxx.lanl.gov/abs/cond-mat/0002112.</a> 61.12.Ex; 74.60.Ge; 74.70.Tx.
<p>
 H. R. Khan, K. Lueders, K. Kajikawa, M. Baenitz, and C. Ecker,
 "Irreversibility Fields of Polycrystalline Hg(1-x)PbxBa2Ca2Cu3Oy
 Superconductors." Department of Materials Physics, Forschungsinstitut
 fuer Edelmetalle und Metallchemie, D-73525 Schwaebisch Gmuend, GERMANY.
<p>
 Chan-Joong Kim, Young A. Jee, Gye-Won Hong, Tae-Hyun Sung, Young-Hee
 Han, Sang-Chul Han, and Sang-Jun Kim, "Investigation of Melting and
 Resolidification of Sm1.8Ba2.4Cu3.4Ox in Ba-Cu-O Melt at the Temperature
 Below its Melting Point." To be published in J. Mater. Sci. Lett.
 Superconductivity Research Laboratory, Korea Atomic Energy Research
 Institute, P.O. Box 105, Yusung, Taejon 305-600, SOUTH KOREA; telephone
 +82 42 868 8908; telefax +82 42 862 5496; e-mail
 <a href="mailto:cjkim2@nanum.kaeri.re.kr">cjkim2@nanum.kaeri.re.kr.</a>
<p>
 Hyeong-Jin Kim, Jae-Hyuk Choi, Mun-Seog Kim, Sung-Ik Lee, and Jin-Tae
 Kim, "Magnetization Study of Organic Superconductor kappa-(BEDT-
 TTF)2Cu(NCS)2." To be published in Physica C (in press). National
 Creative Research Initiative Center for Superconductivity, Department of
 Physics, Pohang University of Science and Technology, Pohang, Kyungbuk
 790-784, SOUTH KOREA; telephone +82 562 279 5498; telefax +82 562 279
 5299; e-mail <a href="mailto:hjkim72@postech.ac.kr">hjkim72@postech.ac.kr.</a> Key words: organic superconductor,
 thermodynamic parameters, vortex fluctuations. 74.25.Bt; 74.25.Ha;
 74.60.Ec; 74.70.Kn.
<p>
 M. R. Koblischka, T. H. Johansen, M. Baziljevich, M. Murakami, and Th.
 Wolf, "SQUID and Magneto-Optic Investigations of Flux Turbulence."
 Presented at the 6th Int. Conf. on Mater. and Mech. of Supercond. and
 High Temp. Supercond. (M^2S-HTSC-VI), Houston, Tex., Feb. 20-25, 2000;
 to be published in Physica C. Nordic Superconductor Technologies A/S,
 Priorparken 685, DK-2605 Brondby, DENMARK; e-mail <a href="mailto:mk@nst.com">mk@nst.com</a> or
 <a href="mailto:michael.koblischka@risoe.dk">michael.koblischka@risoe.dk.</a>
<p>
 M. R. Koblischka, T. H. Johansen, B. Larsen, N. H. Andersen, H. Wu, P.
 Skov-Hansen, M. Bentzon, and P. Vase, "Magneto-Optical Investigations of
 Multifilamentary Bi-2223 Tapes." Presented at the 6th Int. Conf. on
 Mater. and Mech. of Supercond. and High Temp. Supercond. (M^2S-HTSC-VI),
 Houston, Tex., Feb. 20-25, 2000; to be published in Physica C. Nordic
 Superconductor Technologies A/S, Priorparken 685, DK-2605 Brondby,
 DENMARK; e-mail <a href="mailto:mk@nst.com">mk@nst.com</a> or <a href="mailto:michael.koblischka@risoe.dk">michael.koblischka@risoe.dk.</a>
<p>
 M. R. Koblischka, M. Muralidhar, and M. Murakami, "Flux Pinning in 123-
 Type High-Tc Superconductors." To be published in Studies of High Temp.
 Supercond., Vol. 31, edited by A. Narlikar (Nova Science Publishers, New
 York). Nordic Superconductor Technologies A/S, Priorparken 685, DK-2605
 Brondby, DENMARK; e-mail <a href="mailto:mk@nst.com">mk@nst.com</a> or <a href="mailto:michael.koblischka@risoe.dk">michael.koblischka@risoe.dk.</a>
<p>
 Anke Koehler, Franz M. Sauerzopf, Martin Zehetmayer, Andreas Erb, and
 Harald W. Weber, "Influence of Neutron Irradiation on the Fishtail
 Behavior of YBa2Cu3O7-d Single Crystals." To be published in Physica C.
 Atomic Institute of the Austrian Universities, A-1020 Wien, AUSTRIA;
 Harald W. Weber's e-mail <a href="mailto:weber@ati.ac.at">weber@ati.ac.at.</a>
<p>
 J. David Kokales, Patrick Fournier, Lucia V. Mercaldo, Vladimir V.
 Talanov, Richard L. Greene, and Steven M. Anlage, "Microwave
 Electrodynamics and Pairing Symmetry of Electron-Doped Cuprate
 Superconductors." Submitted to Phys. Rev. Lett. Contact Steven M.
 Anlage, Center for Superconductivity Research, Department of Physics,
 University of Maryland, College Park, MD 20742-4111; telephone (301)
 405-7321; telefax (301) 405-3779; e-mail <a href="mailto:anlage@squid.umd.edu">anlage@squid.umd.edu;</a> preprint
 also available at <a href="http://xxx.lanl.gov/abs/cond-mat/0002300">http://xxx.lanl.gov/abs/cond-mat/0002300.</a> 74.25.Nf;
 74.25.Fy; 74.72.Jt.
<p>
 Alejandro B. Kolton, Daniel Dominguez, and Niels Gronbech-Jensen,
 "Dynamical Ordering in the c Axis in 3D Driven Vortex Lattices."
 Submitted to the Proc. of the 6th Int. Conf. on Mater. and Mech. of
 Supercond. and High Temp. Supercond. (M^2S-HTSC-VI), Houston, Tex., Feb.
 20-25, 2000. Centro Atomico Bariloche, Av. Bustillo 9500, 8400 S. C. de
 Bariloche, Rio Negro, ARGENTINA; e-mail <a href="mailto:koltona@cab.cnea.edu.ar">koltona@cab.cnea.edu.ar;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/0002017">http://xxx.lanl.gov/abs/cond-mat/0002017.</a>
<p>
 Raphael A. Lehrer and David R. Nelson, "B(H) Constitutive Relations near
 H_[c1] in Disordered Superconductors." To be published in Physica C (in
 press). Contact David R. Nelson, Lyman Laboratory of Physics, Harvard
 University, Cambridge, MA 02138; telefax (617) 496-2545; e-mail
 <a href="mailto:nelson@cmts.harvard.edu">nelson@cmts.harvard.edu;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9908117">http://xxx.lanl.gov/abs/cond-mat/9908117.</a> Key words: constitutive
 relations, quenched random disorder, type-II superconductor.
<p>
 V. V. Luparev, G. M. Kuz'micheva, and E. P. Klybov, "Preparation Methods
 of Perovskite-Like Complex Oxides (Hg,Ce,Cu)(Sr,Ln,Ca)2(Ln,Ca,Sr)Cu2O6+d
 (1212) with Superconducting Properties." To be published in J. Phys.
 Met. Contact G. M. Kuz'micheva, Department of Solid State Physics and
 Chemistry, M.V. Lomonosov State Academy of Fine Chemical Technology,
 Prospekt Vernadsky 86, Moscow 117571, RUSSIA; telephone +7 095 248 0762;
 telefax +7 095 434 8711; e-mail <a href="mailto:galkuz@orc.ru">galkuz@orc.ru.</a> (Paper in Russian.)
<p>
 Tulika Maitra, "Thermodynamic Properties of d_[x^2-y^2] + id_[xy]
 Superconductor." To be published in Physica C (in press). Department
 of Physics and Meteorology, Indian Institute of Technology, Kharagpur
 721302, INDIA; telefax +91 3222 55303; e-mail
 <a href="mailto:tulika@phy.iitkgp.ernet.in">tulika@phy.iitkgp.ernet.in;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002114">http://xxx.lanl.gov/abs/cond-mat/0002114.</a> Key words: superconductors,
 superfluid density, thermodynamic properties. 74.72.-h; 74.20.Fg.
<p>
 E. Martinez, L. A. Angurel, J. C. Diez, A. Larrea, M. Aguilo, and R.
 Navarro, "Grain Texture and Bulk Magnetic Anisotropy Correlation in
 Polycrystalline Bi2Sr2CaCu2O8+d Thin Rods." To be published in Physica
 C (in press). Contact L. A. Angurel, Instituto de Ciencia de Materiales
 de Aragon (I.C.M.A.), Centro Politecnico Superior de Ingenieros, CSIC-
 Universidad de Zaragoza, Maria de Luna 3, E-50015 Zaragoza, SPAIN;
 telephone +34 976 761958; telefax +34 976 761957; e-mail
 <a href="mailto:angurel@posta.unizar.es">angurel@posta.unizar.es.</a> Key words: BSCCO, texture, magnetic
 anisotropy. 74.72.Hs; 74.80.Bj; 74.25.Ha; 74.60.Jg.
<p>
 E. Martinez, Y. Yang, C. Beduz, and Y. B. Huang, "Experimental Study of
 Loss Mechanisms of AgAu/PbBi-2223 Tapes with Twisted Filaments Under
 Perpendicular ac Magnetic Fields at Power Frequencies." To be published
 in Physica C (in press). Institute of Cryogenics, School of
 Engineering, University of Southampton, Highfield, Southampton SO17 1BJ,
 UNITED KINGDOM; telephone +44 1703 592872; telefax +44 1703 593230; e-
 mail <a href="mailto:emf@soton.ac.uk">emf@soton.ac.uk.</a> Key words: ac losses, multifilamentary
 superconducting tapes, magnetization, twisting. 74.25.Ha; 74.60.Ec;
 85.25.Kx.
<p>
 E. Mendoza, T. Puig, E. Varesi, A. E. Carrillo, J. Plain, and X.
 Obradors, "Critical Current Enhancement in YBCO-Ag Melt Textured
 Composites: Influence of Microcrack Density." To be published in
 Physica C. Instituto de Ciencia de Materiales de Barcelona, Consejo
 Superior de Investigaciones Cientificas, Campus de la UAB, E-08193
 Bellaterra, Barcelona, SPAIN; telephone +34 93 580 18 53; telefax +34 93
 580 57 29; e-mail <a href="mailto:ernest@icmab.es">ernest@icmab.es.</a> Key words: melt processing YBCO, Ag
 addition, critical currents, microstructure. 74.60.Jg; 74.62.Dh;
 74.72.Bk.
<p>
 B. H. Moeckly, "Interface-Engineered Josephson Junctions." Presented at
 the 1999 Int. Workshop on Supercond. (4th Joint ISTEC/MRS Hawaii
 Workshop), Kauai, Hawaii, June 27-30, 1999. Conductus, Inc., 969 W.
 Maude Avenue, Sunnyvale, CA 94086; e-mail <a href="mailto:moeckly@conductus.com">moeckly@conductus.com.</a>
<p>
 B. H. Moeckly and Y. M. Zhang, "Tunable Dielectric Thin Films for HTS
 Microwave Applications." Conductus, Inc., 969 W. Maude Avenue,
 Sunnyvale, CA 94086; e-mail <a href="mailto:moeckly@conductus.com">moeckly@conductus.com.</a>
<p>
 M. Mora, E. Martinez, L. A. Angurel, and R. Navarro, "Annealing
 Evolution of the Flux Pinning in Well-Textured Bi-2212 Thin Rods." To
 be published in Physica C (in press). Contact L. A. Angurel,
 Departamento de Ciencia y Tecnologia de Materiales y Fluidos, Centro
 Politecnico Superior, Instituto de Ciencia de Materiales de Aragon
 (I.C.M.A.), Universidad de Zaragoza, Maria de Luna 3, E-50015 Zaragoza,
 SPAIN; telephone +34 976 761958; telefax +34 976 761957; e-mail
 <a href="mailto:angurel@posta.unizar.es">angurel@posta.unizar.es.</a> Key words: Bi-2212, textured bulk HTS
 materials, flux pinning, V-I characteristics. 74.72.Hs; 74.60.Jg;
 74.60.Ge.
<p>
 Dirk K. Morr, Joerg Schmalian, and David Pines, "Spin and Charge
 Inhomogeneities in High-Tc Cuprates: Evidence from NMR and Neutron
 Scattering Experiments." Theoretical Division, T-11, Mail Stop B-262,
 Los Alamos National Laboratory, Los Alamos, NM 87545; telephone (505)
 665-1166; telefax (505) 665-4063; e-mail <a href="mailto:morr@viking.lanl.gov">morr@viking.lanl.gov.</a>
 74.25.Ha; 74.25.Nf.
<p>
 P. Mueller, S. Rother, O. Waldmann, S. Heim, M. Moessle, and R. Kleiner,
 "Gap-to-Pseudogap Evolution of Bi2Sr2CaCu2O8+d Near Optimal Doping."
 Physikalisches Institut III, Universitaet Erlangen-Nuernberg, D-91058
 Erlangen, GERMANY. 74.25.-q; 74.50.+r; 74.72.Hs; 74.80.Dm.
<p>
 M. Muralidhar, M. R. Koblischka, and M. Murakami, "(Nd,Eu,Gd)-Ba-Cu-O
 Superconductors with Combined Additions of CeO2 and Pt." To be
 published in Supercond. Sci. & Technol.: Proc. of the 2nd Int. Workshop
 on the Proc. and Appl. of Supercond. (RE)BCO Large Grain Materials,
 Morioka, Japan, Oct. 19-22, 1999. Superconductivity Research
 Laboratory, Division 3, International Superconductivity Technology
 Center (ISTEC), 3-35-2 Iioka-Shinden, Morioka, Iwate 020-0852, JAPAN;
 telephone +81 19 635-9015 or -9016; telefax +81 19 635-9017; e-mail
 <a href="mailto:miryala1@istec.or.jp">miryala1@istec.or.jp.</a> Key words: melt processing, NEG-123, TEM, sub-
 micron particles, high critical current density.
<p>
 M. Muralidhar, T. Miyamoto, and M. Murakami, "Field Dependence of
 Trapped Fields in (Nd,Eu,Ge)-Ba-Cu-O Bulk Superconductors." To be
 published in Supercond. Sci. & Technol.: Proc. of the 2nd Int. Workshop
 on the Proc. and Appl. of Supercond. (RE)BCO Large Grain Materials,
 Morioka, Japan, Oct. 19-22, 1999. Superconductivity Research
 Laboratory, Division 3, International Superconductivity Technology
 Center (ISTEC), 3-35-2 Iioka-Shinden, Morioka, Iwate 020-0852, JAPAN;
 telephone +81 19 635-9015 or -9016; telefax +81 19 635-9017; e-mail
 <a href="mailto:miryala1@istec.or.jp">miryala1@istec.or.jp.</a> Key words: NEG-123 bulk, Nd-123 seed, trapped
 field, critical current density (Jc).
<p>
 T. Nakane, Y. Morooka, E. S. Otabe, T. Matsushita, M. Karppinen, and H.
 Yamauchi, "Effects of Sr Substitution on the Magnetic-Field
 Irreversibility in Superconductive Cu(Ba1-ySry)2YbCu2O6+z." To be
 published in Physica C. Contact H. Yamauchi, Materials & Structures
 Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku,
 Yokohama 227, JAPAN; telephone +81 45 924-5315; telefax +81 45 924-5365
 or -5360; e-mail <a href="mailto:yamauchi@materia.titech.ac.jp">yamauchi@materia.titech.ac.jp.</a>
<p>
 S. A. Nemov, R. V. Parfeniev, D. V. Shamshur, P. P. Konstantinov, M. O.
 Safonchik, D. I. Popov, J. Stepien-Damm, and D. Kaczorowski,
 "Observation of Superconducting and Structural Phase Transitions in Sn1-
 zGezTe:In Solid Solutions." To be published in Physica C (in press).
 State Technical University, Politechnicheskaya str. 29, St. Petersburg
 195251, RUSSIA; telephone +7 812 552 9671; e-mail
 <a href="mailto:nemov@tvonet.stu.neva.ru">nemov@tvonet.stu.neva.ru.</a> Key words: superconductivity, structural
 phase transition, semiconductors, solid solutions. 71.28.+d; 74.70.Ad.
<p>
 X. Oudet, "The Quantum State and the Doublets." To be published in
 Annales de la Fondation Louis de Broglie. 26 rue des Ecoles, F-78400
 Chatou, FRANCE; telefax +33 1 3952 8481; e-mail <a href="mailto:oudet@physique.uvsq.fr">oudet@physique.uvsq.fr.</a>
<p>
 C. Panagopoulos, B. D. Rainford, J. R. Cooper, and C. A. Scott,
 "Antiferromagnetic Correlations versus Superfluid Density in La2-
 xSrxCuO4." Presented at the 6th Int. Conf. on Mater. and Mech. of
 Supercond. and High Temp. Supercond. (M^2S-HTSC-VI), Houston, Tex., Feb.
 20-25, 2000. Interdisciplinary Research Centre in Superconductivity,
 University of Cambridge, Madingley Road, Cambridge CB3 0HE, UNITED
 KINGDOM; telephone +44 1223 337 072; telefax +44 1223 337 074; e-mail
 <a href="mailto:cp200@hermes.cam.ac.uk">cp200@hermes.cam.ac.uk;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002239">http://xxx.lanl.gov/abs/cond-mat/0002239.</a>
<p>
 E. L. Papadopoulou, P. Nordblad, and P. Svedlindh, "Dynamic Scaling of
 Granular Bi2Sr2CaCu2O8: Evidence of a Chiral-Glass Transition?"
 Department of Materials Science, Uppsala University, SE-751 21 Uppsala,
 SWEDEN.
<p>
 V. Ta Phuoc, A. Ruyter, R. de Sousa, L. Ammor, E. Olive, and J. C.
 Soret, "Effect of Field Tilting on the Vortices in Irradiated Bi-2212."
 Submitted to the Proc. of the 6th Int. Conf. on Mater. and Mech. of
 Supercond. and High Temp. Supercond. (M^2S-HTSC-VI), Houston, Tex., Feb.
 20-25, 2000; to be published in Physica C. Laboratoire
 d'Electrodynamique des Materiaux Avances, Universite de Tours, UFR
 Sciences et Techniques, Parc de Grandmont, F-37200 Tours, FRANCE; e-mail
 <a href="mailto:taphuoc@delphi.phys.univ-tours.fr">taphuoc@delphi.phys.univ-tours.fr;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002271">http://xxx.lanl.gov/abs/cond-mat/0002271.</a>
<p>
 David Pines, "Quantum Protectorates in the Cuprate Superconductors." To
 be published in Physica C: Proc. of the 6th Int. Conf. on Mater. and
 Mech. of Supercond. and High Temp. Supercond. (M^2S-HTSC-VI), Houston,
 Tex., Feb. 20-25, 2000. LANSCE Division, Los Alamos National
 Laboratory, Los Alamos, NM 87545; preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002281">http://xxx.lanl.gov/abs/cond-mat/0002281.</a>
<p>
 R. Prozorov, R. W. Giannetta, P. Fournier, and R. L. Greene, "Evidence
 for d-Wave Pairing in Electron-Doped Superconductors." Submitted to
 Phys. Rev. Lett. Loomis Laboratory of Physics, University of Illinois
 at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801-3080; e-
 mail <a href="mailto:prozorov@uiuc.edu">prozorov@uiuc.edu;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002301">http://xxx.lanl.gov/abs/cond-mat/0002301.</a>
<p>
 G. C. Rout, B. N. Panda, and S. N. Behera, "Mutual Influence of
 Superconductivity and Magnetism in Strongly Correlated Cuprates." To be
 published in Physica C (in press). Department of Physics, G. M.
 College, Sambalpur, Orissa 768004, INDIA. Key words: magnetic
 superconductor, antiferromagnetic order, Cu-O planes, BCS model.
 75.50.Ee.
<p>
 M. Ruther, H. Forster, M. Eisterer, and H. W. Weber, "Trapped Field
 Measurements on Melt Textured Bulk Superconductors in Liquid Nitrogen."
 To be published in Physica C. Atominstitut der Oesterreichischen
 Universitaeten, A-1020 Wien, AUSTRIA; H. W. Weber's e-mail
 <a href="mailto:weber@ati.ac.at">weber@ati.ac.at.</a>
<p>
 S. Saito, H. Yoshimoto, Y. Y. Suzuki, and S. Kurihara, "Quantum Phase
 Transition in Extended Attractive Hubbard Model." Submitted to Phys.
 Rev. Lett. Department of Physics, Waseda University, 3-Okubo, Tokyo
 169-8555, JAPAN; telephone +81 3 5286 3447; telefax +81 3 5286 3487; e-
 mail <a href="mailto:saito@kh.phys.waseda.ac.jp">saito@kh.phys.waseda.ac.jp;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002288">http://xxx.lanl.gov/abs/cond-mat/0002288.</a> 74.20.Fg; 71.30.+h; 71.45.Lr;
 74.25.Dw; 74.20.-z; 74.25.-q.
<p>
 Edson Sardella, "Magnetic Field of an In-Plane Vortex Inside and Outside
 a Layered Superconducting Film." Departamento de Fisica, Faculdade de
 Ciencias, Universidade Estadual Paulista, Caixa Postal 473, 17033-360
 Bauru-SP, BRAZIL; e-mail <a href="mailto:sardella@email.fc.unesp.br">sardella@email.fc.unesp.br;</a> preprint also
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/0002152">http://xxx.lanl.gov/abs/cond-mat/0002152.</a> 74.60.Ec;
 74.60.Ge.
<p>
 Franz M. Sauerzopf, M. Zehetmayer, A. Koehler, and H. W. Weber, "Can the
 Collective Pinning Approach be Applied to YBa2Cu3O7-d Superconductors?"
 To be published in Physica C. Atominstitut, TU Wien, A-1020 Wien,
 AUSTRIA; H. W. Weber's e-mail <a href="mailto:weber@ati.ac.at">weber@ati.ac.at.</a>
<p>
 V. V. Srinivasu, V. Sreedevi, K.-I. Itoh, A. Hashizume, M. Tada, J.
 Yamada, S. Moehlecke, Y. Kopelevich, and T. Endo, "Microwave Absorption
 in BSCCO Single Crystals." To be published in the Proc. of the Int.
 School on Crystal Growth Methods and Processes, Chennai, India, Jan. 24
 - Feb. 4, 2000. Faculty of Engineering, Mie University, 1515 Kamihama,
 Tsu, Mie 514-8507, JAPAN; T. Endo's telephone +81 592 32 1211; telefax
 +81 592 31 9471; e-mail <a href="mailto:endo@cm.elec.mie-u.ac.jp">endo@cm.elec.mie-u.ac.jp.</a>
<p>
 Xiao-dong Su, Jai-moo Yoo, Jae-wong Ko, Hai-doo Kim, Hyung-sik Chung, Z.
 Q. Yang, and Gui-wen Qiao, "The Influence of Precursor Powders on the
 Phase Evolution, Grain Size and Transport Current Properties of BSCCO
 2223 Ag-Sheathed Tapes." To be published in Physica C (in press).
 Institute of Metal Research, Chinese Academy of Sciences, 72 Wenthav
 Road, Shenyang 110015, PEOPLE'S REPUBLIC OF CHINA; telephone +86 242 384
 3531; telefax +86 242 3891 320; e-mail <a href="mailto:xdsu@hotmail.com">xdsu@hotmail.com.</a> Key words:
 Bi-2223/Ag-sheathed tapes, precursor powder, critical current density,
 grain size. 74.25.Fy; 74.60.Ge; 74.60.Jg; 74.72.Hs.
<p>
 S. V. Sudareva, E. I. Kuznetsova, T. P. Krinitsina, I. B. Bobylev, and
 E. P. Romanov, "Modulated Structures in Non-Stoichiometric YBa2Cu3O7-d
 Compounds." To be published in Physica C (in press). Institute of
 Metal Physics, Ural Division of Russian Academy of Sciences, S.
 Kovalevskaya Str. 18, GSP-170, Ekaterinburg 620219, RUSSIA; telephone +7
 3432 499 179; telefax +7 3432 745 244; e-mail <a href="mailto:krinitsina@imp.uran.ru">krinitsina@imp.uran.ru.</a>
 Key words: non-stoichiometric YBa2Cu3O7-d compound, low-temperature
 annealing, oxygen separation, atomic displacement waves, modulated
 structure.
<p>
 H. Suematsu, H. Okamura, S. Lee, S. Nagaya, and H. Yamauchi, "A Possible
 Cause of Peak Effect in the Y-Ba-Cu-O Melt-Grown Bulks: Modulation in
 Oxygen Distribution." To be published in Physica C. Contact H.
 Yamauchi, Materials & Structures Laboratory, Tokyo Institute of
 Technology, 4259 Nagatsuta, Midori-ku, Yokohama 227, JAPAN; telephone
 +81 45 924-5315; telefax +81 45 924-5365 or -5360; e-mail
 <a href="mailto:yamauchi@materia.titech.ac.jp">yamauchi@materia.titech.ac.jp.</a>
<p>
 Y. Takahama, H. Suematsu, T. Matsushita, and H. Yamauchi, "Dependence of
 Peak Effect on the Particle Size in Superconducting SmBa2Cu3O7-d Powder
 Samples." To be published in Physica C. Contact H. Yamauchi, Materials
 & Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta,
 Midori-ku, Yokohama 227, JAPAN; telephone +81 45 924-5315; telefax +81
 45 924-5365 or -5360; e-mail <a href="mailto:yamauchi@materia.titech.ac.jp">yamauchi@materia.titech.ac.jp.</a>
<p>
 K. Tanaka and F. Marsiglio, "Anderson's 'Theorem' and Bogoliubov-de
 Gennes Equations for Surfaces and Impurities." Submitted to Physica C:
 Proc. of the 6th Int. Conf. on Mater. and Mech. of Supercond. and High
 Temp. Supercond. (M^2S-HTSC-VI), Houston, Tex., Feb. 20-25, 2000.
 Department of Physics, University of Alberta, Edmonton, Alberta, CANADA
 T6G 2J1; e-mail <a href="mailto:ktanaka@phys.ualberta.ca">ktanaka@phys.ualberta.ca;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002260">http://xxx.lanl.gov/abs/cond-mat/0002260.</a>
<p>
 Takami Tohyama and Sadamichi Maekawa, "Angle-Resolved Photoemission in
 High-Tc Cuprates from Theoretical Viewpoints." To be published in
 Supercond. Sci. & Technol. Institute for Materials Research, Tohoku
 University, Sendai 980-8577, JAPAN; e-mail <a href="mailto:tohyama@imr.tohoku.ac.jp">tohyama@imr.tohoku.ac.jp;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/0002225">http://xxx.lanl.gov/abs/cond-mat/0002225.</a>
 79.60.-i; 74.20.-z; 74.25.Jb.
<p>
 S. Toenies, H. W. Weber, D. Milliken, Y. C. Guo, S. X. Dou, A. Gandini,
 R. Sawh, Y. Ren, and R. Weinstein, "Influence of Neutron Irradiation on
 the Superconducting Properties of BiSCCO Tapes Containing Different
 Amounts of Uranium." To be published in Physica C. Atomic Institute of
 the Austrian Universities, Technical University of Vienna, Stadionallee
 2, A-1020 Wien, AUSTRIA; H. W. Weber's e-mail <a href="mailto:weber@ati.ac.at">weber@ati.ac.at.</a>
<p>
 C. C. Tsuei and J. R. Kirtley, "Phase-Sensitive Evidence for d-Wave
 Pairing Symmetry in Electron-Doped Cuprate Superconductors." IBM T. J.
 Watson Research Center, P.O. Box 218, Yorktown Heights, NY 10598; e-mail
 <a href="mailto:kirtley@watson.ibm.com">kirtley@watson.ibm.com;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/0002341">http://xxx.lanl.gov/abs/cond-mat/0002341.</a>
<p>
 A. Vostner, H. W. Weber, A. Mathen, C. Jooss, J. Hoffmann, and H. C.
 Freyhardt, "Characterization of YBCO Coated Conductors Deposited by LPE
 on MgO Substrates." To be published in Physica C. Atominstitut der
 Oesterreichischen Universitaeten, A-1020 Wien, AUSTRIA; H. W. Weber's e-
 mail <a href="mailto:weber@ati.ac.at">weber@ati.ac.at.</a>
<p>
 H. Yamauchi, M. Karppinen, T. Hosomi, and H. Fjellvag, "Water-Containing
 Phases Derived from '02(n-1)n' Superconductors: I. Novel 02(n-1)n
 Homologous Series in the Ba-Ca-Cu-O System and the Derivative Series."
 To be published in Physica C. Materials & Structures Laboratory, Tokyo
 Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 227, JAPAN;
 telephone +81 45 924-5315; telefax +81 45 924-5365 or -5360; e-mail
 <a href="mailto:yamauchi@materia.titech.ac.jp">yamauchi@materia.titech.ac.jp.</a>
<p>
 H. Yamauchi, M. Karppinen, T. Hosomi, and H. Suematsu, "Water-Containing
 Phases Derived from '02(n-1)n' Superconductors: II. Derivative of the
 Sr2Ca2Cu3O8+-d (0^[Sr]223) Phase." To be published in Physica C.
 Materials & Structures Laboratory, Tokyo Institute of Technology, 4259
 Nagatsuta, Midori-ku, Yokohama 227, JAPAN; telephone +81 45 924-5315;
 telefax +81 45 924-5365 or -5360; e-mail <a href="mailto:yamauchi@materia.titech.ac.jp">yamauchi@materia.titech.ac.jp.</a>
<p>
 Youichi Yanase and Kosaku Yamada, "Effect of Magnetic Field on the
 Pseudogap Phenomena in High-Tc Cuprates." Department of Physics, Kyoto
 University, Kyoto 606-8502, JAPAN; e-mail <a href="mailto:yanase@ton.scphys.kyoto-">yanase@ton.scphys.kyoto-</a>
 u.ac.jp; preprint also available at <a href="http://xxx.lanl.gov/abs/cond-">http://xxx.lanl.gov/abs/cond-</a>
 mat/0002274. Key words: high-Tc cuprates, pseudogap phenomena, strong-
 coupling superconductivity, superconducting fluctuation, 1/T_1T,
 magnetic field dependence, transport coefficient.
<p>
 Masateru Yoshizumi, Makoto Kambara, Yuh Shiohara, and Takateru Umeda,
 "Effect of Oxygen Partial Pressure on Quasi-Ternary Phase Diagram of
 NdO1.5-BaO-CuO System." To be published in Physica C (in press).
 Superconductivity Research Laboratory, International Superconductivity
 Technology Center (ISTEC), 1-10-13 Koto-ku, Tokyo 135-0062, JAPAN;
 telephone +81 3 3536 5711; telefax +81 3 3536 5705; e-mail
 <a href="mailto:yoshizumi@istec.or.jp">yoshizumi@istec.or.jp.</a> Key words: phase diagram, oxygen partial
 pressure, Nd123, solid solution.
<p>
 Oron Zachar, "Stripes: Why Hole Rich Lines are Antiphase Domain Walls?"
 International Centre for Theoretical Physics, 11 Strada Costiera, I-
 34100 Trieste, ITALY; e-mail <a href="mailto:zachar@lps.u-psud.fr">zachar@lps.u-psud.fr;</a> preprint also
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/0001217">http://xxx.lanl.gov/abs/cond-mat/0001217.</a>
 <hr>
<p>
 COMING EVENTS
 (An * indicates a previously listed event. Also see complete listing of
 upcoming conferences and workshops at our Web site
 <a href="http://www.iitap.iastate.edu/htcu/comevents.html.)">http://www.iitap.iastate.edu/htcu/comevents.html.)</a>
<p>
 July 1 - 9, 2000: 6th Advanced Studies on Superconducting Engineering
 (ASSE2000), Eger, Hungary. Detailed studies on the newest results and
 their engineering aspects both in fundamental research and applications
 of high-temperature superconductors. The main frame is a series of
 lectures held by well-known scientists, researchers, engineers, and
 experts. After lectures, the unique "Club of Scientists" will be
 organized to provide time for free discussions. The last three days of
 the Studies will be devoted to a workshop for each participant willing
 to present the results of her/his work. The purpose of ASSE2000 is: to
 introduce a wide range of aspects of superconducting engineering to
 interested people; to get together researchers, engineers, students,
 lecturers, and scientists to discuss new results and ideas in the HTS
 field; and to make new friendships and create a partnership among
 participants. After ASSE2000, a special two-day (July 10-11, 2000)
 satellite workshop will be held on Superconducting Flywheels -- all
 participants are invited to attend. Contact Dr. Istvan Vajda,
 Department of Electrical Machines and Drives, Technical University of
 Budapest, H-1111 Budapest, Egry Jozsef u. 18., Hungary; telephone +36 1
 463-2961; telefax +36 1 463-3600, e-mail <a href="mailto:vajda@">vajda@</a> supertech.vgt.bme.hu.
<p>
 *Aug. 1 - 4, 2000: Minisymposium on Correlation in Mesoscopic Systems,
 Miramare, Trieste, Italy. Objective is to bring together leading
 researchers actively working in the field of normal-metal mesoscopic
 systems and 2D metal-insulator transitions, in order to discuss the most
 recent developments and research directions. Topics are interaction in
 mesoscopic systems, 2D delocalization transition, and non-equilibrium
 meso-scopics. Scientists and physicists from all countries that are
 members of the UN, UNESCO, or IAEA can attend the Minisymposium. Some
 funds are available for subsistence allowance to a limited number of
 participants from developing countries. No registration fee. Deadline
 for participation request, March 31, 2000. Request for participation
 obtainable via e-mail from <a href="mailto:smr1234@">smr1234@</a> ictp.trieste.it. Contact Ms. E.
 Brancaccio, Minisymposium on Correlation in Mesoscopic Systems,
 International Centre for Theoretical Physics, Strada Costiera 11, I-
 34014 Trieste, Italy; telephone +39 040 2240284; telefax +39 040
 2245163; e-mail <a href="mailto:SMR1234@ictp.trieste.it">SMR1234@ictp.trieste.it;</a> Web site <a href="http://www.ictp">http://www.ictp.</a>
 trieste.it/cgi-bin/ICTPsmr/mkhtml/smr2html.pl?smr1234/Bulletin.
<p>
 *Sept. 17 - 22, 2000: The Applied Superconductivity Conference (ASC
 2000), Pavilion Convention Center, Virginia Beach, Virginia. Premier
 conference on applied superconductivity held every two years. The
 meeting will highlight the latest developments and will feature invited
 presentations that offer an exciting look into the future. Papers will
 be presented in three general areas of superconductivity: large scale,
 materials, and electronics. Further information available at the Web
 site <a href="http://www.ascinc.org">http://www.ascinc.org.</a>
<p>
 <hr>
<p>
 High-Tc Update is the high-Tc superconductivity information exchange
 newsletter. Please send 1) preprints, reprints, and other research
 reports; 2) descriptions of on-going work; 3) meeting announcements and
 summaries.
<p>
 The information contained herein is intended for limited distribution.
 Readers are expected to respect the rights of the authors.
<p>
 Please address all contributions and inquiries to:
 Dr. Sreeparna Mitra, A219 Physics
 Ames Laboratory/Iowa State University
 Ames, Iowa 50011-3020
 Telephone: (515) 294-3877 Telefax: (515) 294-1134
 E-mail: <a href="mailto:MITRA@AMESLAB.GOV">MITRA@AMESLAB.GOV</a> or <a href="mailto:MITRA@IASTATE.EDU">MITRA@IASTATE.EDU</a>
<p>
<p>
 Project Director/Editor: Sreeparna Mitra
 Science Editor: John R. Clem
 High-Tc Update, Vol. 14, #6, March 15, 2000.
 <hr>