Theory of Unconventional Superconductors: Cooper-Pairing Mediated by Spin Excitations

ISBN-13: 9783642059513 / Angielski / Miękka / 2010 / 228 str.

Dirk Manske

Opis

This book presents a theory for unconventional superconductivity driven by spin excitations. Using the Hubbard Hamiltonian and a self-consistent treatment of the spin excitations, the interplay between magnetism and superconductivity in various unconventional superconductors is discussed. In particular, the monograph applies this theory for Cooper-pairing due to the exchange of spin fluctuations to the case of singlet pairing in hole- and electron-doped high-Tc superconductors, and to triplet pairing in
Sr2RuO4. Within the framework of a generalized Eliashberg-like treatment, calculations of both many normal and superconducting properties as well as elementary excitations are performed. The results are related to the phase diagrams of the materials which reflect
the interaction between magnetism and superconductivity.

Spis treści

Introduction.- Theory for Cooper-pairing due to the exchange of spin fluctuations.- Results for high-Tc cuprates employing a generalized Eliashberg theory: doping dependence.- Results for Sr2RuO4.- Summary, conclusions, and critical remarks.- Appendix A Solution method for the generalized Eliashberg equations for cuprates.- Appendix B Derivation of the self-energy (weak-coupling case).- Appendix C dx2_y2 -wave superconductivity due to phonons?