High-Tc Copper Oxide Superconductors and Related Novel Materials (eBook)

Foreword 6
Contents 10
Chapter 1: Electronic Phase Separation and Electron-Phonon Coupling in Cuprate Superconductors 13
Prologue 13
Electronic Phase Separation in Cuprates: From Early Theories to Current Experiments 14
Charge Inhomogeneities and Electron-Phonon Coupling 18
Enhancement of the Electron-Phonon Vertex Due to Correlation Effects in the Limit of Small Momentum Transfer 19
Superconductivity Induced by Long Wavelength Optical Phonons 22
Conclusions 24
References 24
Chapter 2: The Search for Higher Tc in Houston 27
Interface-Induced Superconductivity 30
Layered Cuprate Superconductors with a Tc Above 164K 33
Hydrogen-Rich Molecular Compounds 36
Optimization of Multi-interaction in Multiferroics 38
References 39
Chapter 3: From Granular Superconductivity to High Tc 41
Tel Aviv, 1978 41
Alex Muller Learns and Teaches Superconductivity 42
Is There Anything Common to Granular Aluminum and the High Tc Oxides? 42
Granular Aluminum Is Not a Metal in the Conventional Sense 43
Conclusion 45
References 46
Chapter 4: Alex and the Origin of High-Temperature Superconductivity 47
Introduction 47
Lattice Effects 48
Iron-Pnictide Superconductors 51
Origin of HTSC 53
Role of the Mottness and AMF Order 53
Possible Mechanism of HTSC 54
Spin-Channel e-p Coupling 54
Real-Space Polaronic Effect 54
Role of the Orbitals 55
Alex and HTSC 55
References 56
Chapter 5: Encounters with Alex 59
Early Days 59
Some Differences 61
Stockholm 62
Trondheim Again 63
Two on the Roof, in Pisa 65
Alex in Trondheim Again: Doctor Honoris Causa 66
Nobel Book and Followup 67
Chapter6: The Barocaloric Effect: A Spin-off of the Discovery of High-Temperature Superconductivity 70
Introduction 70
The Barocaloric Effect (BCE) 71
Basic Principles 71
Structurally Driven BCE 73
PrLaO3 73
PrxLa1-xNiO3 73
Magnetically Driven BCE 76
BCE in a Kondo System 78
Valence Driven BCE 78
Achievements in High-Temperature Superconductivity 79
Inhomogeneous Materials Character 79
Oxygen and Copper Isotope Effects 80
Concluding Remarks 82
References 82
Chapter 7: Personal Reflections on High-Tc Superconductivity 84
To Alex Mueller on Turning 90 84
Chapter 8: NMR of Cuprate Superconductors: Recent Developments 87
Introduction 87
NMR and Cuprate Superconductors 89
Failure of the Single Fluid Description 93
Average Charge at Cu and O in the CuO2 Plane 95
Charge-Resolved Cuprate Phase Diagram 98
Charge and Spin Density Variations in the CuO2 Plane 100
Conclusion and Outlook 104
References 104
Chapter 9: Towards an Understanding of Hole Superconductivity 108
Introduction 108
Holes in Condensed Matter Physics 110
Electron-Hole Asymmetric Polarons and Dynamic Hubbard Models 112
Hole Superconductivity in Materials 114
The Central Question in Superconductivity 115
Why Holes Are Not Like Electrons 116
How Holes Answer the Central Question in Superconductivity 118
Discussion 121
References 121
Chapter 10: Short Scale Phase Separation of Polarons 125
Introduction 125
Single Polaron in the Adiabatic Approximation 126
Ordering of Charged Polarons: Lattice Gas Model 128
Coulomb Frustrated First Order Phase Transition 132
Conclusion 134
References 134
Chapter11: Jahn-Teller-Effect Induced Superconductivity in Copper Oxides: Theoretical Developments 136
Introduction by Hiroshi Kamimura 136
General Introduction 137
Non-rigid Energy Band Theory for Copper Oxide Superconductors 137
Emergence of Spin-Singlet Quasiparticles and the Origin of Fermi Arcs 141
Emergence of the KS Particles at the Metal-Insulator Transition and the Occurrence of Fermi Pockets 143
Fermi Surface Structure of LSCO, and the Doping and Temperature Dependences of the Electronic Entropy of LSCO 144
A. Construction of the Fermi Surface (FS) of LSCO from the Energy Bands Having the Feature of Doping-Induced Alteration 144
B. The Doping and Temperature Dependences of the Electronic Entropy of LSCO (Theory and Experimental Results) 144
Notable Doping and Temperature Revolutions of FS Structure of LSCO 147
The Origin of Pseudogap 147
New Phase Diagram for LSCO, 148
Phonon-Mechanism in d-Wave Superconductivity 148
The Doping Dependence of the Critical Temperature and the Isotope Effect 152
Why Are the Electron-Phonon Interactions in Cuprates Strong? 153
Method Section 154
The K-S Hamiltonian 154
References 155
Chapter 12: Isotope Effect on the Transition Temperature Tc in Fe-Based Superconductors: The Current Status 158
Introduction 158
Fe Isotope Effect on Tc and the Crystal Structure of FeSe1-x 160
Fe Isotope Effect on the Crystal Structure of FeSe1-x 160
Fe Isotope Effect on Tc of FeSe1-x 161
The Structural and the Intrinsic Contributions to the Fe-IE in FeSe1-x 162
Genuine (Intrinsic) and Structural Isotope Effects in Fe-based HTS 164
Summary of Fe-IE Measurements on the Transition Temperature Tc 164
The Genuine Fe-IE Exponent via Phonon Frequency Measurements 168
Isotope Effect Within the Multiple Gap Scenario of Fe-Based HTS 169
Conclusions 169
References 170
Chapter13: Electron Paramagnetic Resonance in Superconducting Cuprates 172
Introduction 172
The EPR Silence and the Cuprum Spin Excitations Bottleneck 174
Spin Dynamics and A Phase Separation in Superconducting Cuprates Near the Phase Transition 179
Concluding Remarks 184
References 184
Chapter 14: Electron-Lattice Interaction and High Tc Superconductivity 186
Introduction 186
``Legend´´ and Its End 188
Critical Experiments 189
Pressure and High Tc Superconductivity in Hydrides 190
Personal Remarks 193
References 195
Chapter 15: Raman Study of the Anharmonicity in YBa2Cu3Ox 196
Introduction 196
Experiment 197
Results and Discussion 198
Summary 206
References 206
Chapter 16: Inter-site Pair Superconductivity: Origins and Recent Validation Experiments 208
Introduction 208
The Predictions of the JT-C Model 210
New Experimental Evidence 213
Discussion 216
Concluding Remarks 217
References 217
Chapter 17: Dynamical Lattice Distortions in High-Tc Cuprate Superconductors 220
Introduction 220
Dynamical Local Lattice Distortions 221
Conclusions 224
References 225
Chapter 18: Exciting Times in Condensed-Matter Physics 228
References 235
Chapter 19: Intimacy Between Local Lattice and High Temperature Superconductivity: Perspective View on Undeniable Facts 237
Background 237
Local Lattice Matters: Carrier-Induced Local Distortion in LSCO 238
Undeniable Facts: Local Lattice Dancing in LSCO 242
What Is a Realistic Model?: Bond Alternation as a Criterion 243
Perspective View: Never Stop Quest for the Unified Mechanism 245
References 246
Chapter 20: Chemical Aspects of the Phase Separation in Alkali Metal Intercalated Iron Selenide Superconductors 248
Introduction 248
Synthesis and Crystal Growth 249
Structural Properties. Iron Vacancy Ordering. Phase Separation 250
Summary 256
References 257
Chapter 21: Essential Role of Barium for Reaching the Highest Tc´s in Superconducting Cuprates 258
References 265
Chapter 22: Scientific Remembrances and Some Comments 267
First Meeting and the Ferroelectric Transition 267
The Debye-Waller Factor at Structural Transitions 268
Structural Phase Transitions 268
The Fermi School on Local Properties at Phase Transitions 269
Again Structural Transitions and the ``Central Peak´´ 269
Laurea H.C. in Pavia 271
The HTcSC, Astonishing Consequences and ``Collateral´´ Effects 272
A Further Remark 279
Une découverte aux particularités remarquables 279
References 280
Chapter 23: Method for Accurate Determination of the Electron Contribution: Specific Heat of Ba0.59K0.41Fe2As2 281
Introduction 281
Contributions to the Specific Heat The Determination of the Lattice Contribution
Samples and Measurements 286
Specific-Heat Results and Analysis 286
Discussion 294
Summary 299
References 300
Chapter 24: Thermal and Quantum Critical Properties of Overdoped La2-x SrxCuO4 302
References 308
Chapter 25: Scientific Collaboration with Warm Relations 309
Introduction: Hydrogen Effects in Cuprate High-Tc Superconductors 309
EPR Study of Manganites and Cuprates 311
Return to Georgia 313
``Coulomb Engineering´´ in Cuprates 313
Photostimulated Solid State Reaction 314
References 318
Chapter 26: Oxygen Isotope Effect Resulting from Polaron-Induced Superconductivity in Cuprates 319
References 323