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Thermodynamics of two lattice ice models in three dimensions
Chizuru Muguruma1, Yuko Okamoto, Bernd A Berg
1School of International Liberal Studies, Chukyo University, Toyota, Aichi, Japan.
Abstract:
In a recent paper we introduced two Potts-like models in three dimensions, which share the following properties: (A) One of the ice rules is always fulfilled (in particular also at infinite temperature, beta=0 ). (B) Both ice rules hold for ground-state configurations. This allowed for an efficient calculation of the residual entropy of ice I (ordinary ice) by means of multicanonical simulations. Here we present the thermodynamics of these models in more details. Despite their similarities with Potts models, no sign of a disorder-order phase transition is found.
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