Thermodynamic Green functions in theory of superconductivity
A general theory of superconductivity is formulated within the thermodynamic Green function method for various types of pairing mediated by phonons, spin fluctuations, and strong Coulomb correlations in the Hubbard and t-J models. A rigorous Dyson equation for matrix Green functions is derived in...
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| Datum: | 2006 |
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| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Інститут фізики конденсованих систем НАН України
2006
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/121371 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Thermodynamic Green functions in theory of superconductivity / N.M. Plakida // Condensed Matter Physics. — 2006. — Т. 9, № 3(47). — С. 619–633. — Бібліогр.: 27 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | A general theory of superconductivity is formulated within the thermodynamic Green function method for various
types of pairing mediated by phonons, spin fluctuations, and strong Coulomb correlations in the Hubbard
and t-J models. A rigorous Dyson equation for matrix Green functions is derived in terms of a self-energy as
a many-particle Green function. By applying the noncrossing approximation for the self-energy, a closed selfconsistent
system of equations is obtained, similar to the conventional Eliashberg equations. A brief discussion
of superconductivity mediated by kinematic interaction with an estimation of a superconducting transition
temperature in the Hubbard model is given. |
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