Polarons and Bipolarons in High-Tc Superconductors and Related Materials de E. K. H. Salje

Polarons and Bipolarons in High-Tc Superconductors and Related Materials

E. K. H. Salje

A. S. Alexandrov

W. Y. Liang

This book is the first to give a comprehensive view on the polaron and bipolaron theory of high-temperature superconductivity, one of the most significant discoveries in physics in the past decade. With the discovery of high-temperature superconductors, research into polarons and bipolarons has attracted much attention. They have also been observed previously in magnetic semiconductors and transition metal oxides. The thorough investigation of these non-superconducting materials has contributed greatly to the basic understanding of the physical properties of both polarons and bipolarons. This book will be of great interest to researchers in condensed matter physics, and especially those working in the field of superconductivity.

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Cuprins

1. A polaron theory of high temperature superconductors; 2. On the possibility of non-BCS superconductivity; 3. Bipolaron Bose-liquid in high-Tc superconductors; 4. Spin polarons in high-Tc superconductors; 5. The polaron scenario for high-Tc superconductors; 6. Formation, phase separation and superconductivity of large bipolarons; 7. Polarons and bipolarons in WO3-x YBa2Cu3O7; 8. Polaron bands in the far- and mid-infrared spectra of e-doped cuprates; 9. Electron–phonon interaction of non-equilibrium carriers in the photoinduced state of YBa2Cu3O7-d; 10. Experimental evidence of local lattice distortion in superconducting oxides; 11. Hall effect due to small polarons and conduction in narrow energy bands; 12. Static and dynamic conductivity of untwinned YBa2Cu4O8: gaps or condensation?; 13. The near infrared and optical absorption of high-Tc superconductors using powders; 13a. Polaronic theory of mid-infrared conductivity: a numerical cluster study; 14. Electromagnetic properties of local pair superconductors; 15. Electron–hole asymmetric polarons; 16. On the nature of the superconducting state in high-Tc cuprates; 17. High-Tc superconductivity with polarons and bipolarons: an approach from the insulating states; 18. Coexistence of small polaron and Anderson localisation in high-Tc superconducting materials; 19. Concentration and temperature dependence of magnetic polaron spectra in the t-J model; 20. Mass enhancement without band-narrowing in t-t'-J related models: predictions for Fermi-surface and optical conductivity; 21. Polarons in Peierls–Hubbard models; 22. Exact estimates of inter-polaron coupling constants resulting in bipolaron formation; 23. Coulomb interaction and the criteria for bipolaron formation; 24. Large bipolarons and high-Tc materials; 25. Collective excitations in the ground state of a two-dimensional attractive Fermi gas; 26. Strong two-band electron trapping, state hybridization effects and related pressure induced phenomena in semiconductors; 26a. Bismuth disproportionation in super and semiconducting barium bismuthates; 27. Magnetic polarons in concentrated and diluted magnetic semiconductors; 28. Energy scales of exotic superconductors.