Two-time Green's functions in superconductivity theory
type: Item
instance of: scholarly article
title: Two-time Green's functions in superconductivity theory
zbMATH Open document ID: 1176.82053
author: N. M. Plakida
published in: Theoretical and Mathematical Physics
publication date: 2008-09-23T00:00:00Z
review text: In this paper there are derived superconductivity equations for both the general fermion-boson model and the Hubbard model with strong Coulomb correlation. This is done by differentiating the Green's functions in order to derive a Dyson-type equation, which is solved in the approximation of noncrossing diagrams for the self-energy operator. The theory incorporates the method of the equations of motion for two-time thermodynamic Green's functions, which allows the author to obtain strong-coupling equations of the Migdal-Eliashberg-type for calculating the self-energy operator in the approximation of noncrossing diagrams. The solution of the self-consistent system of equations in the strong-coupling approximation of the Hubbard model given in this paper allows concluding that the superconducting \(d\)-wave pairing with a high critical temperature is optimal.
reviewed by: Vicenţiu D. Rădulescu
Mathematics Subject Classification ID: 82D55
Mathematics Subject Classification ID: 78A15
zbMATH DE Number: 5346149
zbMATH Keywords: superconductivity theory
zbMATH Keywords: electron-phonon interaction
zbMATH Keywords: spin fluctuation
zbMATH Keywords: strong electron correlation
zbMATH Keywords: Hubbard model
MaRDI profile type: Publication
full work available at URL: s11232-008-0010-2
OpenAlex ID: W2019614006
cites work: Theory of Superconductivity
DOI: 10.1007/S11232-008-0010-2
description: scientific article; zbMATH DE number 5346149