AN IMPROVED CORRELATED EFFECTIVE-FIELD THEORY FOR THE S=1 2 PURE ISING-MODEL/

Authors
ZHENG SM
Citation
Sm. Zheng, AN IMPROVED CORRELATED EFFECTIVE-FIELD THEORY FOR THE S=1 2 PURE ISING-MODEL/, Physica status solidi. b, Basic research, 180(2), 1993, pp. 463-477
Citations number
24
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
180
Issue
2
Year of publication
1993
Pages
463 - 477
Database
ISI
SICI code
0370-1972(1993)180:2<463:AICETF>2.0.ZU;2-C
Abstract
An improved correlated effective-field theory is introduced for the S = 1/2 pure Ising model. The theory is based on an approximate decoupli ng formula for a spin operator which is more reasonable than that in t he correlated effective-field theory (CEFT) and is applied to some lat tices for calculating the Curie temperatures. The results are superior to CEFT.