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28 March 2024
 
  » arxiv » cond-mat/0403674

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Spin Model for Inverse Melting and Inverse Glass Transition
Nurith Schupper ; Nadav M. Shnerb ;
Date 28 Mar 2004
Subject Statistical Mechanics; Soft Condensed Matter | cond-mat.stat-mech cond-mat.soft
AbstractA spin model that displays inverse melting and inverse glass transition is presented and analyzed. Strong degeneracy of the interacting states of an individual spin leads to entropic preference of the "ferromagnetic" phase, while lower energy associated with the non-interacting states yields a "paramagnetic" phase as temperature decreases. An infinite range model is solved analytically for constant paramagnetic exchange interaction, while for its random exchange, analogous results based on the replica symmetric solution are presented. The qualitative features of this model are shown to resemble a large class of inverse melting phenomena. First and second order transition regimes are identified.
Source arXiv, cond-mat/0403674
Other source [GID 504072] pmid15323860
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