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Phase transitions in three-dimensional three-state Potts model
Authors:F Fucito  A Vulpiani
Institution:Istituto di Fisica “G. Marconi”, Università degli Studi, Rome, Italy
Abstract:We have performed a Monte Carlo investigation of the nature of the phase transition in the three-state, three-dimensional Potts model with nearest and next nearest neighbour coupling. We find strong evidence for a first-order phase transition in the case of ferromagnetic coupling. In the case of a first neighbour ferromagnetic coupling and second neighbour antiferromagnetic, there is evidence for a second-order transition. This result supports the idea that a second-order transition can be present in systems which, according to the Landau criterium, should only undergo a first-order transition.
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