Symmetry And Pairing In Superconductors (nato Science Partnership Sub-series: 3:)

These Proceedings of a NATO-ARW (HTECH ARW 97 1843) held at the Oreanda Hotel, Yalta, Ukraine from April 29 till May 2 , 1998 resulted from many discussions between various workers, concerning the need for a gathering of all (if possible) who were concerned with the subject of symmetry of the order parameter and pairing states for superconductivity. We applied ourselves in particular to High critical Temperature Superconductors (HTS), but also studied other unconventional superconductors. The study of HTS is one of the most prominent research subjects in solid state sciences. The understanding of the role of symmetry and pairing conditions are also thought to be necessary before technological applications since these features may be influenced by external fields. The workshop discussions have touched upon theoretical and experimental aspects, but also on related topics. These served as initiators for a very great amount of discussions with many comments from the audience. More than thirty "long lectures" and one on­ going "poster session" were held. Private discussions went unrecorded but obviously took place at many locations : lecture halls, staircases, cafes, bedrooms, bars, beach,bus, plane... Arguments openly reported for the first time were often quite sharp ones, -and this is an understatement. Front Matter....Pages i-xii Front Matter....Pages 1-1 Day of Unconventional Superconductors....Pages 3-10 Tunneling Spectroscopy of the Heavy Electron Superconductor UBe 13 ....Pages 11-18 Influence of Inelastic Quasiparticle Scattering on Thermodynamic and Transport Properties of High-Temperature Oxides....Pages 19-30 Anisotropic 3D Fluctuation Conductivity In Y 1 Ba 2 Cu 3 O 7−y Thin Films....Pages 31-39 Quantum Monte Carlo Simulations of the Two-Dimensional Attractive Hubbard Model: Phase Diagram and Spectral Properties....Pages 41-70 Rhombic Vortex Lattice in d -Wave Superconductivity....Pages 71-82 Pseudogaps and Magnetic Properties of the t-J Model....Pages 83-90 Probing s ± id Pairing State via Thermoelectric Response of SND Junction....Pages 91-99 Generalized BCS-Type Model for the Acoustic Plasmon Induced D -Wave Superconductivity....Pages 101-107 Spin Fluctuation Pairing in the t- J Model....Pages 109-119 Charge Density Fluctuations and Gap Symmetry in High- T C Superconductors with Extended Saddle-Point Features in Electron Spectrum....Pages 121-130 Vortex Lattice Melting Theories as an Example of Science Fiction....Pages 131-140 Numerical Simulation of Flux-Creep in Presence of a Pinning Strength Distribution for the Washboard-Type Potential....Pages 141-150 Electric Field Effects in High- T C Cuprates with Different Bulk and Surface Conductivities....Pages 151-160 The Orbital Symmetry of the Order Parameter in HTSC: The Controversy Continues....Pages 161-172 Dynamic Axial Charge Transfer Processes in La 2−x Sr x CuO 4 ....Pages 173-186 Coexistence of Superconductivity with Charge- or Spin- Density Waves....Pages 187-198 Instability of A 2-Dimensional Landau-Fermi Liquid due to Umklapp Scattering....Pages 199-209 Momentum Broadening in the Interlayer Pair-Tunneling Model of High- T C Superconductivity....Pages 211-218 Effects of Van Hove Singularities on Thermal Properties of High- T C Superconductors....Pages 219-229 Front Matter....Pages 1-1 Mean Free Path Effects on the Electronic Raman Spectra of d -Wave Superconductors....Pages 231-244 s - and d -Wave Pairing in Short Coherence Length Superconductors....Pages 245-258 K-Space Gap Anisotropy within the Interlayer Pair-Tunneling Mechanism of High- T C Superconductivity....Pages 259-267 Front Matter....Pages 269-269 Point-Contact Spectroscopy of Superconducting R Ni 2 B 2 C ( R =Rare Earth, Y)....Pages 271-285 Theory and Experimental Evidence for Pair FQHE State Caused by Zero-Point Harmonic Oscillation in Block-Layer Potential....Pages 287-287 Different Estimates of the Anisotropy from Resistive Measurements in High- T C Superconductors....Pages 289-300 Vortex Lattice Melting and Viscosity in Y 0.6 Dy 0.4 Ba 2 Cu 3 O 7−X Superconductor Studied by Electrical Resistivity....Pages 301-316 Is Fluctuation Conductivity a Probe to Determine the Presence of S or D -Wave Pairing in High-T C Superconductors?....Pages 317-326 Pseudo-Gap and Crossover from the 2D Heisenberg to the Even-Leg Spin-Ladder Regime in Underdoped Cuprates....Pages 327-336 The Influence of Grain Boundary Roughness on Tricrystal Symmetry Tests....Pages 337-346 Localized Cluster States Studied by EPR in R 123 Compounds....Pages 347-357 Fluctuation Contributions to the Transport Properties of Hg 1.4 Ba 2 Ca 2 Cu 3 O 8+δ and Bi 2 Sr 1.8 Ca 1.2 Cu 2 O 8 Polycrystalline Superconductors....Pages 359-370 Front Matter....Pages 371-371 Transformation of Thermal Energy into Electric Energy in an Inhomogeneous Superconducting Ring....Pages 373-382 Phase Transition Related with ‘Spin Density Lattice’ in TbNiSn ....Pages 383-391 Quote from ”The Innocents Abroad” (1869) by Mark Twain....Pages 393-393 Theory and Experimental Evidence for Pair FQHE State Caused by Zero-Point Harmonic Oscillation in Block-Layer Potential....Pages 395-408 Back Matter....Pages 409-410

this Book Contains The Latest Findings Of Some Of The World's Leading Researchers On High Tc Superconductivity, Including Considerations Of The Order Parameter And The Pairing Conditions. Both Theoretical And Advanced Experimental Results Are Outlined. Considerations Of D-, S-, Or More Complicated Order Parameter Symmetry Are Discussed At Length, Serving As A Benchmark For An Overall View Of The Field As Of April 1998.
Many Of The Results Presented Are New And Have Neither Appeared Nor Been Discussed Previously. Interesting Experimental Facts Are Given On Junctions And Fluctuations, Both In The Presence And Absence Of A Magnetic Field. Electronic, Optical, Magnetic And Transport Properties Are Discussed.
The Editors' Concern For Coherence And Legibility Means That The Book Can Be Read By Anyone Concerned With Superconductivity. No Other Book Focuses So Closely On An Understanding Of Symmetry And Pairing In Superconductors.

booknews

the Proceedings Consists Of 37 Papers Presented At The April-may 1998 Workshop On The Symmetry Of The Order Parameter And Pairing States For, In Particular, High Critical Temperature Superconductors (hts), And Other Unconventional Superconductors. Some Papers Are More Theoretical While Others Report Data Analysis From Experiments. Topics Include Pseudogaps And Magnetic Properties Of The T-j Model, The Coexistence Of Superconductivity With Charge- Or Spin-density Waves, The Effects Of Van Hove Singularities On Thermal Properties Of Htss, The Influence Of Grain Boundary Roughness On Tricrystal Symmetry Tests, And The Transformation Of Thermal Energy Into Electric Energy In An Inhomogenous Superconducting Ring. Annotation C. Book News, Inc., Portland, Or (booknews.com)

These Proceedings of a NATO-ARW (HTECH ARW 97 1843) held at the Oreanda Hotel, Yalta, Ukraine from April 29 till May 2, 1998 resulted from many discussions between various workers, concerning the need for a gathering of all (if possible) who were concerned with the subject of symmetry of the order parameter and pairing states for superconductivity. We applied ourselves in particular to High critical Temperature Superconductors (HTS), but also studied other unconventional superconductors. The study of HTS is one of the most prominent research subjects in solid state sciences. The understanding of the role of symmetry and pairing conditions are also thought to be necessary before technological applications since these features may be influenced by external fields. The workshop discussions have touched upon theoretical and experimental aspects, but also on related topics. These served as initiators for a very great amount of discussions with many comments from the audience. More than thirty "long lectures" and one onƯ going "poster session" were held. Private discussions went unrecorded but obviously took place at many locations : lecture halls, staircases, cafes, bedrooms, bars, beach, bus, plane ... Arguments openly reported for the first time were often quite sharp ones, -and this is an understatement