Electronic Properties of High-Tc Superconductors and Related Compounds: Proceedings of the International Winter School, Kirchberg, Tyrol, March 3-10,

ISBN-13: 9783642843471 / Angielski / Miękka / 2011 / 416 str.

Hans Kuzmany; Michael Mehring; J. Rg Fink

Opis

This collection of recent results reports transport-property measurements on high-Tc superconductors and investigations by means of microwave conductivity, optical spectroscopy, high-energy spectroscopy, and nuclear magnetic resonance. Further contributions consider problems related to structure, doping, the electron-phonon interaction, electron correlation, and mechanisms of high-Tc superconductivity. Reviews providing introductions for nonspecialists to particular areas are followed by research reports detailing our current understanding.

Spis treści

I General Properties, Preparation, Doping, Structure.- Experimental Results on High-Tc Superconductors: A Critical Selection.- Double Chains in YBa2Cu4O8 (Tc = 80K) and Y2Ba4Cu7O15±x (14? Tc ? 70K) and Their Influence on the Physical Properties.- Constitution of the System Bi-Sr-Ca-Cu-O and Preparation of the Three Superconducting Compounds.- Optimization of the Laser Ablation Process for Epitaxial YBCO Thin Film Growth.- New Dielectric Substrates for Microwave and Far-Infrared Applications of High-Tc Thin Films.- On Incommensurate Phases in High-Tc Compounds.- Substitutional and Oxygen Doping in YBa2Cu3Oy.- The Effect of Cu/Zn Substitution upon Superconductivity in Nd1.85Ce0.15CuO4.- Hole Density in the High-Temperature Superconductor (Bi, Pb)SrCaCuO.- Influence of Pb Doping on the Physical Properties of the BiSrCaCuO System.- Spatial Inhomogeneity in Superconducting YBaCuO-Films.- II Transport, Tunneling, Thermal Properties.- Surface Impedance of High-Tc Superconductors.- Detection of Flux Creep by Microwave Absorption.- Magnetic Investigations of Grain and Weak Link Properties in Bi1-xPbxSrCaCu1.8Oy.- Size Dependence of the ac Susceptibility and Critical Current Densities of YBa2Cu3O7-? Superconductors.- Y1-xGdxBa2Cu3O7-? and YBa2Cu3-xGdx O7-?: Similarities and Differences.- Electron Tunneling into Y1Ba2Cu3O7 Thin Films.- Model for Field-Dependent Microwave Absorption in Granular High-Tc Superconductors.- The Tunneling Gaps of YBa2Cu3O x: High-Tc Superconductors.- Superconducting Pair Density from Specific Heat Measurements.- III High-Energy Spectroscopies.- Electron Energy-Loss Studies on High-Tc Superconductors.- Electronic Structure of Transition Metal Compounds.- Gap Measurements of High-Tc Superconductors by High Resolution Electron Spectroscopy.- Electronic Structure of Bi2Sr2CaCu2O8 by Angle-Resolved Photoemission.- The Influence of Hybridization on the Spin and Charge Distribution in High-Tc Superconductors.- Local Partial Electronic Structure of High-Tc Superconductors and Related Oxides by X-Ray Emission Spectroscopy.- Polarized Cu-LIII XAS: Relation Between the Symmetry of the d-Holes and the Critical Temperature.- Calculation of Photoionization Cross Sections and Optical Conductivity for Models of High-Tc Superconductors.- Evidence for Jahn-Teller Distortions in Bi-Sr-Ca-Cu-O High-Tc Superconductors.- Electron Energy-Loss Studies on n-Type Doped Superconductors.- Does the Cu 4s Orbital Play a Role in Electron Doping of the Sm2-xCexCuO4-? Compound?.- Hole Doping in RE2NiO4+?.- Electron Energy-Loss Studies on La2-x.Srx CuO4.- Possible Sequence of Hole Injection in YBa2Cu3O6+y and Reverse Model of Metallization for La2CuO4/Nd2CuO4 by Impurity Hole/Electron Levels in the Band Gap.- IV Hyperfine Interactions, Magnetic Properties.- 205T1 NMR High-Tc Superconductors: Hyperfine Interactions of Localized and Delocalized Electrons.- Cu NQR and NMR Studies in Y-Ba-Cu-O Superconductors.- 89Y NMR Studies of the Electronic Properties of the 123 Compounds.- 17O NMR Investigation of the Electronic Structure of High-Tc Superconducting Oxides.- Magnetic Order in 123 Compounds as Seen by Cu NMR and NQR.- La and Cu NQR Relaxation in La2-xSrxCuO4: Cu2+ Localized Spin Dynamics and the Interplay with the O(2p) Holes.- Electric Field Gradient of Ba in YBa2Cu3Oy.- NQR Investigations on Oriented High-Tc Powder Samples.- A Local Method Study of the Magnetic Transition in YBa2(Cu1-xFex)3O6.- Electron Paramagnetic Resonance in Gd Doped YBa2Cu3O6.02.- EPR of a Paramagnetic Probe on the Surface of YBa2Cu3O7-?.- Pressure-Induced Charge Redistribution in ErBa2Cu3Ox Determined by Neutron Crystal-Field Spectroscopy.- Magnetic Anisotropy of High-Tc Superconductors in the Normal Phase.- V Optical Spectroscopy, Raman Scattering.- Optical Absorption in Non-BCS Superconductors.- Optical Reflectivity of Bi2Sr2CaCu2O8 Crystals.- Optical Excitations in Single Crystals of YBa2Cu3O7-? Between 5 meV and 6 eV.- Strong-Coupling Effects in the Infrared Conductivity of Superconductors.- Far-Infrared Excitations in YBa2Cu3O7-? Thin Films.- Low Energy Optical Excitations in High-Tc Superconducting Systems from Photomodulation Spectroscopy.- Raman Scattering and Infrared Spectroscopy of Substituted and Oxygen-Doped YBa2Cu3Oy.- Optical Investigation of the Superconducting Phase Transition in YBa2Cu3O7 Crystals.- FIR Measurements of Zn-Substituted YBCO Ceramics.- Anomalies of Infrared Active Phonons in Superconducting Tl2Ba2Ca2Cu3O10.- Probes of Superconductivity: Raman Scattering.- Theory of Raman Scattering in Superconductors.- A Comparative Raman Study of Classical and Oxide Superconductors.- Two-Magnon Scattering in the REBa2Cu3O6.- Resonant Raman Scattering in YBa2Cu3O7, YBa2Cu3O6 and YBa2Cu4O8.- FT Raman Scattering and Luminescence in BaBiO3.- VI Theory.- Charge Distribution and Electric Field Gradient Calculations for YBa2Cu3O7-x.- Total Energy Calculations of the Breathing Mode in BaBiO3.- Antiferromagnetism — Beyond Band Theory.- Orbital Excitations in the Copper Oxides.- Orbital Dynamics and Jahn-Teller Coupling in the CuO2 Planes of the High-Tc Cuprates.- A Polaronic and Bipolaronic Theory of Superconductivity.- Magnetic Order and High-Tc Superconductivity.- Variational Monte Carlo Study for Generalized Flux Phases in the t-J Model.- Combined Phonon-Acoustic Plasmon Theory of High-Tc Copper Oxides.- Optical Phonons in High-Temperature Superconductors: Evidence for Strong Electron-Phonon Coupling.- Anharmonic Lattice Dynamics and Electron-Phonon Coupling in High-Tc Oxide Superconductors.- Energy Gap of Electronic Pair Formation in the One-Dimensional Attractive Hubbard Model.- The 2-D Hubbard-Peierls Model in the Self-Interaction Corrected Density Functional Formalism.- Observable Anomalies in Cuprate Superconductors Related to a Cross-Over from BCS Pairing to Bose-Einstein Condensation.- VII Related Topics.- Structural Aspects of Organic Superconductors.- Index of Contributors.