First order phase transition in the plane rotator ferromagnetic model in two dimensions |
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| Authors: | H Kunz C -E Pfister |
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| Institution: | (1) Laboratoire de Physique Théorique, Ecole Polytechnique Fédérale, CH-1001 Lausanne, Switzerland;(2) Zentrum für Interdisziplinäre Forschung, Universität Bielefeld, D-4800 Bielefeld, Federal Republic of Germany |
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| Abstract: | We show that the two-dimensional isotropic ferromagnetic rotator model exhibits a first order phase transition if the interaction decays asr
– with 2<<4.Work supported by  Fonds National Suisse de la Recherche Scientifique . |
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