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Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data

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dc.contributor.author Zubov, E.E.
dc.date.accessioned 2018-01-18T18:22:29Z
dc.date.available 2018-01-18T18:22:29Z
dc.date.issued 2016
dc.identifier.citation 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. uk_UA
dc.identifier.issn 0132-6414
dc.identifier.other PACS: 79.60.–i, 74.72.–h, 71.27.+a, 71.38.–k
dc.identifier.uri http://dspace.nbuv.gov.ua/handle/123456789/129323
dc.description.abstract 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. uk_UA
dc.description.sponsorship It is a pleasure to acknowledge a number of stimulating discussions with E.M. Rudenko and M.A. Belogolovskii. 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 К 30-летию открытия высокотемпературной сверхпроводимости uk_UA
dc.title Electron dynamics in the normal state of cuprates: Spectral function, Fermi surface and ARPES data uk_UA
dc.type Article uk_UA
dc.status published earlier uk_UA


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