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

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

2002-03-19

arxiv.org/abs/cond-mat/0203388v1

Physics

Condensed Matter

Statistical Mechanics

10 pages, 1 figure

Scientific paper

10.1016/S0378-4371(02)01204-9

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.

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