Heisenberg model in a random field: phase diagram and tricritical behavior

Douglas F de Albuquerque and Alberto S de Arruda

Physica A: Statistical Mechanics and its Applications, 2002, vol. 316, issue 1, 13-18

Abstract: By using the differential operator technique and the effective field theory scheme we study the tricritical behavior of Heisenberg classical model of spin-12 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.

Keywords: Heisenberg model; Effective field; Random field (search for similar items in EconPapers)
Date: 2002
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:316:y:2002:i:1:p:13-18

DOI: 10.1016/S0378-4371(02)01204-9

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