Electron spectrum in high-temperature cuprate superconductors
- 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, Vol. 104, 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); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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