Tricritical behavior of the frustrated XY antiferromagnet

Details Tricritical behavior of the frustrated XY antiferromagnet Tricritical behavior of the frustrated XY antiferromagnet

1994-05-04

arxiv.org/abs/cond-mat/9405009v1

Physics

Condensed Matter

J1K 2R1 4 pages (RevTex 3.0), 4 figures available upon request, Report# CRPS-94-05

Scientific paper

10.1103/PhysRevB.50.16113

Extensive histogram Monte-Carlo simulations of the XY antiferromagnet on a stacked triangular lattice reveal exponent estimates which strongly favor a scenario of mean-field tricritical behavior for the spin-order transition. The corresponding chiral-order transition occurs at the same temperature but appears to be decoupled from the spin-order. These results are relevant to a wide class of frustrated systems with planar-type order and serve to resolve a long-standing controversy regarding their criticality.

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