Umfang:
Online-Ressource
,
v.: digital
Ausgabe:
Online-Ausg. Springer-11651
Ausgabe:
Springer eBook Collection. Physics and Astronomy
ISBN:
9780306482168
Serie:
Fundamental Theories of Physics, An International Book Series on The Fundamental Theories of Physics: Their Clarification, Development and Application 121
Inhalt:
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.
Inhalt:
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.
Weitere Ausg.:
ISBN 9781402001499
Weitere Ausg.:
Erscheint auch als Druck-Ausgabe ISBN 9789048158836
Weitere Ausg.:
Erscheint auch als Druck-Ausgabe ISBN 9781402001499
Weitere Ausg.:
Erscheint auch als Druck-Ausgabe ISBN 9789401739139
Sprache:
Englisch
Schlagwort(e):
Hochtemperatursupraleitung
DOI:
10.1007/0-306-48216-9
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