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Theory of High Temperature Superconductivity: Fundamental Theories of Physics, cartea 121

Autor S. Fujita, S. Godoy
en Limba Engleză Paperback – 4 dec 2010
Flux quantization experiments indicate that the carriers, Cooper pairs (pairons), in the supercurrent have charge magnitude 2e, and that they move independently. Josephson interference in a Superconducting Quantum Int- ference Device (SQUID) shows that the centers of masses (CM) of pairons move as bosons with a linear dispersion relation. Based on this evidence we develop a theory of superconductivity in conventional and mate- als from a unified point of view. Following Bardeen, Cooper and Schrieffer (BCS) we regard the phonon exchange attraction as the cause of superc- ductivity. For cuprate superconductors, however, we take account of both optical- and acoustic-phonon exchange. BCS started with a Hamiltonian containing “electron” and “hole” kinetic energies and a pairing interaction with the phonon variables eliminated. These “electrons” and “holes” were introduced formally in terms of a free-electron model, which we consider unsatisfactory. We define “electrons” and “holes” in terms of the cur- tures of the Fermi surface. “Electrons” (1) and “holes” (2) are different and so they are assigned with different effective masses: Blatt, Schafroth and Butler proposed to explain superconductivity in terms of a Bose-Einstein Condensation (BEC) of electron pairs, each having mass M and a size. The system of free massive bosons, having a quadratic dispersion relation: and moving in three dimensions (3D) undergoes a BEC transition at where is the pair density.
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Specificații

ISBN-13: 9789048158836
ISBN-10: 9048158834
Pagini: 400
Ilustrații: XIX, 374 p.
Dimensiuni: 155 x 235 x 21 mm
Greutate: 0.55 kg
Ediția:2001
Editura: SPRINGER NETHERLANDS
Colecția Springer
Seria Fundamental Theories of Physics

Locul publicării:Dordrecht, Netherlands

Public țintă

Research

Cuprins

Superconducting Transition.- Bloch Electrons.- Phonon-Exchange Attraction.- Quantum Statistical Theory.- Cooper Pairs (Pairons).- Superconductors at 0 K.- Quantum Statistics of Composites.- Bose-Einstein Condensation.- The Energy Gap Equations.- Pairon Energy Gaps. Heat Capacity.- Quantum Tunneling.- Flux Quantization.- Ginzburg-Landau Theory.- Josephson Effects.- Compound Superconductors.- Lattice Structures of Cuprates.- High-Tc Superconductors Below Tc.- Doping Dependence of Tc.- Transport Properties Above Tc.- Out-of-Plane Transport.- Seebeck Coefficient (Thermopower).- Magnetic Susceptibility.- Infrared Hall Effect.- d-Wave Cooper Pairs.- Connection with Other Theories.- Summary and Remarks.