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Title: Electron spectrum in high-temperature cuprate superconductors

Abstract

A microscopic theory for the electron spectrum of the CuO{sub 2} plane within an effective p-d Hubbard model is proposed. The Dyson equation for the single-electron Green's function in terms of the Hubbard operators is derived and solved self-consistently for the self-energy evaluated in the noncrossing approximation. Electron scattering on spin fluctuations induced by the kinematic interaction is described by a dynamical spin susceptibility with a continuous spectrum. The doping and temperature dependence of electron dispersions, spectral functions, the Fermi surface, and the coupling constant {lambda} are studied in the hole-doped case. At low doping, an arc-type Fermi surface and a pseudogap in the spectral function close to the Brillouin zone boundary are observed.

Authors:
;  [1]
  1. Joint Institute for Nuclear Research (Russian Federation)
Publication Date:
OSTI Identifier:
21072532
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 104; Journal Issue: 2; Other Information: DOI: 10.1134/S1063776107020082; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; APPROXIMATIONS; BRILLOUIN ZONES; COPPER OXIDES; COUPLING CONSTANTS; CUPRATES; DOPED MATERIALS; ELECTRON DIFFRACTION; ELECTRON SPECTRA; ELECTRONS; EQUATIONS; FERMI LEVEL; FLUCTUATIONS; GREEN FUNCTION; HUBBARD MODEL; SELF-ENERGY; SPECTRAL FUNCTIONS; SPIN; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE

Citation Formats

Plakida, N. M., E-mail: plakida@theor.jinr.ru, and Oudovenko, V. S.. Electron spectrum in high-temperature cuprate superconductors. United States: N. p., 2007. Web. doi:10.1134/S1063776107020082.
Plakida, N. M., E-mail: plakida@theor.jinr.ru, & Oudovenko, V. S.. Electron spectrum in high-temperature cuprate superconductors. United States. doi:10.1134/S1063776107020082.
Plakida, N. M., E-mail: plakida@theor.jinr.ru, and Oudovenko, V. S.. Sun . "Electron spectrum in high-temperature cuprate superconductors". United States. doi:10.1134/S1063776107020082.
@article{osti_21072532,
title = {Electron spectrum in high-temperature cuprate superconductors},
author = {Plakida, N. M., E-mail: plakida@theor.jinr.ru and Oudovenko, V. S.},
abstractNote = {A microscopic theory for the electron spectrum of the CuO{sub 2} plane within an effective p-d Hubbard model is proposed. The Dyson equation for the single-electron Green's function in terms of the Hubbard operators is derived and solved self-consistently for the self-energy evaluated in the noncrossing approximation. Electron scattering on spin fluctuations induced by the kinematic interaction is described by a dynamical spin susceptibility with a continuous spectrum. The doping and temperature dependence of electron dispersions, spectral functions, the Fermi surface, and the coupling constant {lambda} are studied in the hole-doped case. At low doping, an arc-type Fermi surface and a pseudogap in the spectral function close to the Brillouin zone boundary are observed.},
doi = {10.1134/S1063776107020082},
journal = {Journal of Experimental and Theoretical Physics},
number = 2,
volume = 104,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}