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Interaction of strongly correlated electrons and acoustical phonons

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dc.contributor.author Moskalenko, V.A.
dc.contributor.author Entel, P.
dc.contributor.author Digor, D.F.
dc.date.accessioned 2017-06-11T12:15:34Z
dc.date.available 2017-06-11T12:15:34Z
dc.date.issued 2006
dc.identifier.citation Interaction of strongly correlated electrons and acoustical phonons / V.A. Moskalenko, P. Entel, D.F. Digor // Физика низких температур. — 2006. — Т. 32, № 4-5. — С. 609–633. — Бібліогр.: 34 назв. — англ. uk_UA
dc.identifier.issn 0132-6414
dc.identifier.other PACS: 78.30.Am, 74.72.Dn, 75.30.Gw, 75.50.Ee
dc.identifier.uri http://dspace.nbuv.gov.ua/handle/123456789/120196
dc.description.abstract We investigate the interaction of correlated electrons with acoustical phonons using the extended Hubbard–Holstein model. The Lang–Firsov canonical transformation allows one to obtain mobile polarons for which a new diagram technique and generalized Wick’s theorem is used. The physics of emission and absorption of the collective phonon-field mode by the polarons is discussed in detail. In the strong-coupling limit of the electron-phonon interaction, and in the normal as well as in the superconducting phase, chronological thermodynamical averages of products of acoustical phonon-cloud operators can be expressed by the products of one-cloud operator averages. While the normal one-cloud propagator has the form of a Lorentzian, the anomalous one is of Gaussian form and considerably smaller. We have established the Mott–Hubbard and superconducting phase transitions in this model. uk_UA
dc.description.sponsorship This work was supported by the Heisenberg—Landau Program. It is a pleasure to acknowledge discussions with Prof. N. Plakida and Dr. S. Cojocaru and to thank Vadim Shulezhko for asistance in diagram drawing. V.A.M. would like to thank the University of Duisburg-Essen for financial support. P.E. thanks the Bogoliubov Laboratory of Theoretical Physics, JINR, for the hospitality he received during his stay in Dubna. uk_UA
dc.language.iso en uk_UA
dc.publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України uk_UA
dc.relation.ispartof Физика низких температур
dc.subject Strong Correlations uk_UA
dc.title Interaction of strongly correlated electrons and acoustical phonons uk_UA
dc.type Article uk_UA
dc.status published earlier uk_UA

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