Interaction of strongly correlated electrons and acoustical phonons
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&...
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| Опубліковано в: : | Физика низких температур |
|---|---|
| Дата: | 2006 |
| Автори: | , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2006
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/120196 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | 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. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862582824694972416 |
|---|---|
| author | Moskalenko, V.A. Entel, P. Digor, D.F. |
| author_facet | Moskalenko, V.A. Entel, P. Digor, D.F. |
| citation_txt | 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. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| 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.
|
| first_indexed | 2025-11-26T23:38:33Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-120196 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-26T23:38:33Z |
| publishDate | 2006 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Moskalenko, V.A. Entel, P. Digor, D.F. 2017-06-11T12:15:34Z 2017-06-11T12:15:34Z 2006 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 https://nasplib.isofts.kiev.ua/handle/123456789/120196 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. 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. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Strong Correlations Interaction of strongly correlated electrons and acoustical phonons Article published earlier |
| spellingShingle | Interaction of strongly correlated electrons and acoustical phonons Moskalenko, V.A. Entel, P. Digor, D.F. Strong Correlations |
| title | Interaction of strongly correlated electrons and acoustical phonons |
| title_full | Interaction of strongly correlated electrons and acoustical phonons |
| title_fullStr | Interaction of strongly correlated electrons and acoustical phonons |
| title_full_unstemmed | Interaction of strongly correlated electrons and acoustical phonons |
| title_short | Interaction of strongly correlated electrons and acoustical phonons |
| title_sort | interaction of strongly correlated electrons and acoustical phonons |
| topic | Strong Correlations |
| topic_facet | Strong Correlations |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/120196 |
| work_keys_str_mv | AT moskalenkova interactionofstronglycorrelatedelectronsandacousticalphonons AT entelp interactionofstronglycorrelatedelectronsandacousticalphonons AT digordf interactionofstronglycorrelatedelectronsandacousticalphonons |