EFFECTS OF 2-SITE LOCAL CORRELATION IN THE 2D HUBBARD-MODEL

Authors
MATSUMOTO H ODASHIMA S MANCINI F MARRA S
Citation
H. Matsumoto et al., EFFECTS OF 2-SITE LOCAL CORRELATION IN THE 2D HUBBARD-MODEL, Physica. C, Superconductivity, 263(1-4), 1996, pp. 66-69
Citations number
9
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
263
Issue
1-4
Year of publication
1996
Pages
66 - 69
Database
ISI
SICI code
0921-4534(1996)263:1-4<66:EO2LCI>2.0.ZU;2-1
Abstract
The electronic state of the 2D Hubbard model is investigated by includ ing effects of two-site local correlation. The upper and lower Hubbard bands have a three-peak structure at half-filling. With doping of car riers, an increase of the density of states at the Fermi level is indu ced. The results show similar shapes of the electron spectral function to those obtained in the numerical simulation by Dagotto et al.