PERTURBATION TECHNIQUE FOR THE INFINITE-U HUBBARD-MODEL ON A 2X4 LATTICE WITH 4 HOLES

Authors
SONG Z SHEN H
Citation
Z. Song et H. Shen, PERTURBATION TECHNIQUE FOR THE INFINITE-U HUBBARD-MODEL ON A 2X4 LATTICE WITH 4 HOLES, Physics letters. A, 181(1), 1993, pp. 91-95
Citations number
5
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
181
Issue
1
Year of publication
1993
Pages
91 - 95
Database
ISI
SICI code
0375-9601(1993)181:1<91:PTFTIH>2.0.ZU;2-T
Abstract
A pertubation technique has been applied to the infinite-U Hubbard mod el on a 2 X 4 lattice with four holes. The ground-state energy and spi n we obtained are very close to that obtained by the exact diagonaliza tion method. Our results indicate that the Nagaoka state is unstable f or a hole concentration of 0.5 in the thermodynamic limit.