Heisenberg model in a random field: phase diagram and tricritical behavior
Statistical Mechanics
2009-11-07 v1
Abstract
By using the differential operator technique and the effective field theory scheme we study the tricritical behavior of Heisenberg classical model of spin-1/2 in a random field. The phase diagram in the T-h plane on a square and simple cubic lattice for a cluster with two spins is obtained when the random field is bimodal distributed.
Cite
@article{arxiv.cond-mat/0203388,
title = {Heisenberg model in a random field: phase diagram and tricritical behavior},
author = {Douglas F. de Albuquerque and A. S. de Arruda},
journal= {arXiv preprint arXiv:cond-mat/0203388},
year = {2009}
}
Comments
10 pages, 1 figure