Monte Carlo study of first-order transition in Heisenberg fcc antiferromagnet

Details Monte Carlo study of first-order transition in Heisenberg fcc antiferromagnet Monte Carlo study of first-order transition in Heisenberg fcc antiferromagnet

2005-02-10

arxiv.org/abs/cond-mat/0502255v1

JETP Lett. 81, 236 (2005)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 5 figures

Scientific paper

10.1134/1.1921323

Nearest-neighbor Heisenberg antiferromagnet on a face-centered cubic lattice is studied by extensive Monte Carlo simulations in zero magnetic field. The parallel tempering algorithm is utilized, which allows to overcome a slow relaxation of the magnetic order parameter and fully equilibrate moderate size clusters with up to N ~ 7*10^3 spins. By collecting energy and order parameter histograms on clusters with up to N ~ 2*10^4 sites we accurately locate the first-order transition point at T_c=0.4459(1)J.

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