After an introduction by J.G. Bednorz, describing the discovery of high Tc superconductivity and its consequences, the book goes on to describe modern research, dealing with general problems, new materials and structures, phase separation, electronic homogeneities and related problems, and applications. Specific systems dealt with include the La-cuprates. the Bi-cuprates and the Y-cuprates and related compounds.Proceedings of the NATO Advanced Study Institute, Delphi, Greece, 19-31 August 1996After an introduction by J.G. Bednorz, describing the discovery of high Tc superconductivity and its consequences, the book goes on to describe modern research, dealing with general problems, new materials and structures, phase separation, electronic homogeneities and related problems, and applications. Specific systems dealt with include the La-cuprates. the Bi-cuprates and the Y-cuprates and related compounds.Preface. Part I: Introduction. The Discovery of HTc Superconductivity and its Decisive Circumstances; J.G. Bednorz. Part II: General Problems. `S' and `d' Wave Symmetry Components in High-Temperature Cuprate Superconductors; K.A. M?ller, H. Keller. Theory Aspects of High-Temperature Superconductivity; R. Micnas, S. Robaskiewicz. Part III: New Materials and Structures. Novel Two-Dimensional Perovskites; J.G. Bednorz, et al. Mechanisms Generating Layered Cuprates and Oxycarbonates: Classification; B. Raveau. Mercurocuprates: The Highest Transition-Temperature Superconductors; P.P. Edwards, et al. High Pressure Crystal Growth and Properties of HgBa2Can-1CunO2n+2+delta, Sn1-xCuO2, CaCuO2 and Y2Ba4Cu6+nO14+n; J. Karpinski, et al. Noncuprate Layered Perovskite Superconductor; Y. Maeno, S. Ikeda. Non-Toxic HTSC Materials, Substitution in the Charge Reservoir Layer: `Cupro/Carbonate' Cuprates and Related Materials; M.A. Alario-Franco, et al. Part IV: Phase Separation, Electronic Inhomogeneities, and Related Problems. 1. General. The Two-Component Pal“w