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Tricritical behavior of the frustrated XY antiferromagnet

M. L. Plumer·A. Mailhot·A. Caillé
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Abstract

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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M. L. Plumer, A. Mailhot, A. Caillé. 1994-05-04. Tricritical behavior of the frustrated XY antiferromagnet. https://doi.org/10.1103/physrevb.50.16113

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