Interaction of strongly correlated electrons and acoustical phonons
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Interaction of strongly correlated electrons and acoustical phonons
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| Creator |
Moskalenko, V.A.
Entel, P. Digor, D.F. |
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| Subject |
Strong Correlations
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| Description |
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. |
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| Date |
2017-06-11T12:15:34Z
2017-06-11T12:15:34Z 2006 |
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| Type |
Article
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| Identifier |
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.
0132-6414 PACS: 78.30.Am, 74.72.Dn, 75.30.Gw, 75.50.Ee http://dspace.nbuv.gov.ua/handle/123456789/120196 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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