XY universality of the stacked triangular Ising antiferromagnet

TL;DR

This paper uses Monte Carlo simulations and finite-size scaling to demonstrate that the stacked triangular Ising antiferromagnet exhibits XY universality, confirming symmetry-based predictions and challenging recent claims of a new universality class.

Contribution

It provides numerical evidence supporting XY universality in the stacked triangular Ising antiferromagnet, contrasting with recent alternative universality class proposals.

Findings

Finite-size scaling estimates align with XY universality

Results support earlier symmetry-based predictions

Contradict recent claims of a new universality class

Abstract

Histogram analysis of Monte-Carlo simulation results of the Ising antiferromagnet on a stacked triangular lattice are reported. Finite-size scaling estimates for critical exponents suggest $XY$ universality. This result supports earlier predictions based on symmetry arguments and is in contrast with a recent suggestion of a new universality class by Bunker {\it et al.} [Phys. Rev. B {\bf 48}, 15861 (1993)].