Mechanisms of High Temperature Superconductivity: Proceedings of the 2nd NEC Symposium, Hakone, Japan, October 2427, 1988 [Paperback]

Since the discovery by Bednorz and M?ller of Cu-O alloys displaying high temperature superconductivity, great energy has been put into research in this field. One of the most important and interesting issues, and the subject of this volume, is the clarification of the microscopic origin and mechanism of high temperature superconductivity. This book discusses the latest experimental results on magnetic, optical, electrical, thermal and mechanical properties of the Cu-O and Bi-O superconductors, as well as proposed theoretical models of the mechanisms. The participants in the symposium agreed that for the high Tc Cu-O superconductors electron correlation effects are of central importance. For the Bi-O superconductors the main topic was whether the mechanism of superconductivity is the same as that of high Tc Cu-O superconductors. What was and what was not resolved at the symposium is summarized at the end of the volume.I Plenary Lecture.- The Development of the High-Temperature Superconductivity Field.- II Theoretical Approach.- Spin-Polaron Pairing Mechanism in the High Tc Copper Oxides.- The Importance of Correlation, Multiplet Structure, Hybridization and Symmetry in the Electronic Structure of High Tc Cu Compounds.- Finite Systems Studies and the Mechanism of High Tc.- What Can We Learn from Small-Cluster Studies on CuO2 and Related Models?.- Recent Numerical Studies on Models for High-Tc Superconductors.- Fermi Liquid and Non Fermi Liquid Phases of the Extended Hubbard Model.- Motion of Holes in Magnetic Insulators.- Fractional Quantization in High-Temperature Superconductivity.- Recent Studies of the Cu d-d Excitation Model.- Electronic Structure, Fermi Liquid and Excitonic Superconductivity in the High Tc Cu-Oxides.- Local-Spin-Density-Functional Approach to High-Tc Copper Oxides.- III Experimental Approach.- III.1 Magnetic.- Quasielastic and Inelastic Spin Fluctuations in Superconducting La2-xSrxCuO4.- Two Dimensional Quantum Spin Fluid  Progenitor of High Tlӟ