# 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:

- 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}

}