PHASE TRANSITIONS IN COUPLED SPIN SYSTEMS
Résumé
A simple coupled spin model is presented to describe the phase diagram of plastic crystals. Translational and rotational degrees of freedom are associated respectively with a lattice-gaz Hamiltonian and a q-Potts Hamiltonian. A tetralinear coupling between rotations and translations is considered. Effects of adding random fields which couple solely to the Potts variables are studied.
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Articles anciens
Origine : Accord explicite pour ce dépôt
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