Phase diagrams of lattice systems with residual entropy. II. Low temperature expansion |
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| Authors: | András Sütő Christian Gruber Pirmin Lemberger |
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| Affiliation: | (1) Institut de Physique Théorique, Université de Lausanne, BSP-CH-1015 Lausanne, Switzerland;(2) Institut de Physique Théorique, École Polytechnique Fédérale de Lausanne, PHB-Ecublens, CH-1015 Lausanne, Switzerland |
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| Abstract: | For some lattice systems with an infinite number of ground states, it is shown that the pressure and the coexistence surfaces of several phases admit asymptotic expansions aroundT=0. In particular, it follows that the coexistence surfaces are differentiable atT=0, and at low temperatures the stable states are those with maximal residual entropy. The results are applied to construct the phase diagrams for several spin-1 models. |
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| Keywords: | Phase diagram first-order phase transition residual entropy pressure coexistence surface asymptotic expansion |
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