The three-state Potts model on the centered triangular lattice

Abstract

We study phase transitions of the Potts model on the centered-triangular lattice with two types of couplings, namely $K$ between neighboring triangular sites, and $J$ between the centered and the triangular sites. Results are obtained by means of a finite-size analysis based on numerical transfer matrix calculations and Monte Carlo simulations. Our investigation covers the whole $(K,J)$ phase diagram, but we find that most of the interesting physics applies to the antiferromagnetic case $K<0$, where the model is geometrically frustrated. In particular, we find that there are, for all finite $J$, two transitions when K is varied. Their critical properties are explored. In the limits $J\to \pm \infty$ we find algebraic phases with infinite-order transitions to the ferromagnetic phase.

References in corpus (4)

• Phase transition in the 3-state Potts antiferromagnet on the diced lattice
• Two-dimensional Potts antiferromagnets with a phase transition at arbitrarily large q
• The three-state Potts antiferromagnet on plane quadrangulations
• Critical manifold of the Potts model: Exact results and homogeneity approximation