The ferro/antiferromagnetic q-state Potts model
arXiv:cond-mat/0201383
Abstract
The critical properties of the mixed ferro/antiferromagnetic q-state Potts model on the square lattice are investigated using the numerical transfer matrix technique. The transition temperature is found to be substantially lower than previously found for q=3. It is conjectured that there is no transition for q>3, in contradiction with previous results.
7 pages, 4 figures, accepted for publication in J Phys A