ROTATIONALLY SYMMETRICAL ORDERED PHASE IN THE 3-STATE ANTIFERROMAGNETIC POTTS-MODEL

We investigate the three-state antiferromagnetic Potts model on a simp le cubic lattice with a cluster flipping Monte Carlo simulation algori thm in the temperature region below the transition into disorder at T- c1. We find both the well-established broken-sublattice-symmetry (BSS) phase at low temperature and a rotationally symmetric phase at higher temperature, but below T-c1. The properties of the second phase and t he transition temperature to the BSS phase are in disagreement with re cent cluster-variation and Monte Carlo simulation results, but in agre ement with simulations by Kolesik and Suzuki.