Electron spectrum in high-temperature cuprate superconductors

Journal Article · Sun Apr 15 04:00:00 EDT 2007 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776107020082· OSTI ID:21072532

Oudovenko, V S ^[1]

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1. Joint Institute for Nuclear Research (Russian Federation)

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.

• OSTI ID: 21072532
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 2 Vol. 104; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

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