PARAMAGNETISM IN THE HUBBARD-MODEL WITH S TRONG REPULSION

Authors
ZAITSEV RO MIKHAILOVA YV
Citation
Ro. Zaitsev et Yv. Mikhailova, PARAMAGNETISM IN THE HUBBARD-MODEL WITH S TRONG REPULSION, Fizika nizkih temperatur, 22(11), 1996, pp. 1281-1286
Citations number
5
Categorie Soggetti
Physics, Applied
Journal title
Fizika nizkih temperatur → ACNP
ISSN journal
01326414
Volume
22
Issue
11
Year of publication
1996
Pages
1281 - 1286
Database
ISI
SICI code
0132-6414(1996)22:11<1281:PITHWS>2.0.ZU;2-K
Abstract
The spin magnetic susceptibility is defined in a self-consistent field approximation. It is shown that for both the square lattice and the t riangle lattice with a negative hopping integral the system has parama gnetic properties at all concentrations n < 1. In the case of the tria ngle lattice with a positive hopping integral the system turns into fe rromagnetic state at the hole concentration close to 0.4.