Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data
An influence of the electron-phonon interaction on excitation spectrum and damping in a narrow band electron subsystem of cuprates has been investigated. Within the framework of the t-J model an approach to solving a problem of account of both strong electron correlations and local electron–phonon b...
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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2016 |
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| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2016
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/129323 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data / E.E. Zubov // Физика низких температур. — 2016. — Т. 42, № 11. — С. 1328-1344. — Бібліогр.: 24 назв. — англ. |
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nasplib_isofts_kiev_ua-123456789-129323 |
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Zubov, E.E. 2018-01-18T18:22:29Z 2018-01-18T18:22:29Z 2016 Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data / E.E. Zubov // Физика низких температур. — 2016. — Т. 42, № 11. — С. 1328-1344. — Бібліогр.: 24 назв. — англ. 0132-6414 PACS: 79.60.–i, 74.72.–h, 71.27.+a, 71.38.–k https://nasplib.isofts.kiev.ua/handle/123456789/129323 An influence of the electron-phonon interaction on excitation spectrum and damping in a narrow band electron subsystem of cuprates has been investigated. Within the framework of the t-J model an approach to solving a problem of account of both strong electron correlations and local electron–phonon binding with characteristic Einstein mode ω ₀ in the normal state has been presented. In approximation Hubbard-I it was found an exact solution for the polaron bands. We established that in the low-dimensional system with a pure kinematic part of Hamiltonian a complicated excitation spectrum is realized. It is determined mainly by peculiarities of the lattice Green's function. In the definite area of the electron concentration and hopping integrals a correlation gap may be possible on the Fermi level. Also, in specific cases it is observed a doping evolution of the Fermi surface. We found that the strong electron–phonon binding enforces a degree of coherence of electron-polaron excitations near the Fermi level and spectrum along the nodal direction depends on wave vector module weakly. It corresponds to ARPES data. A possible origin of the experimentally observed kink in the nodal direction of cuprates is explained by fine structure of the polaron band to be formed near the mode −ω₀. It is a pleasure to acknowledge a number of stimulating discussions with E.M. Rudenko and M.A. Belogolovskii. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К 30-летию открытия высокотемпературной сверхпроводимости Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data |
| spellingShingle |
Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data Zubov, E.E. К 30-летию открытия высокотемпературной сверхпроводимости |
| title_short |
Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data |
| title_full |
Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data |
| title_fullStr |
Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data |
| title_full_unstemmed |
Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data |
| title_sort |
electron dynamics in the normal state of cuprates: spectral function, fermi surface and arpes data |
| author |
Zubov, E.E. |
| author_facet |
Zubov, E.E. |
| topic |
К 30-летию открытия высокотемпературной сверхпроводимости |
| topic_facet |
К 30-летию открытия высокотемпературной сверхпроводимости |
| publishDate |
2016 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
An influence of the electron-phonon interaction on excitation spectrum and damping in a narrow band electron subsystem of cuprates has been investigated. Within the framework of the t-J model an approach to solving a problem of account of both strong electron correlations and local electron–phonon binding with characteristic Einstein mode ω ₀ in the normal state has been presented. In approximation Hubbard-I it was found an exact solution for the polaron bands. We established that in the low-dimensional system with a pure kinematic part of Hamiltonian a complicated excitation spectrum is realized. It is determined mainly by peculiarities of the lattice Green's function. In the definite area of the electron concentration and hopping integrals a correlation gap may be possible on the Fermi level. Also, in specific cases it is observed a doping evolution of the Fermi surface. We found that the strong electron–phonon binding enforces a degree of coherence of electron-polaron excitations near the Fermi level and spectrum along the nodal direction depends on wave vector module weakly. It corresponds to ARPES data. A possible origin of the experimentally observed kink in the nodal direction of cuprates is explained by fine structure of the polaron band to be formed near the mode −ω₀.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/129323 |
| citation_txt |
Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data / E.E. Zubov // Физика низких температур. — 2016. — Т. 42, № 11. — С. 1328-1344. — Бібліогр.: 24 назв. — англ. |
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AT zubovee electrondynamicsinthenormalstateofcupratesspectralfunctionfermisurfaceandarpesdata |
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2025-12-07T19:39:31Z |
| last_indexed |
2025-12-07T19:39:31Z |
| _version_ |
1850879636085407744 |