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Baxter–Wu model in the presence of an external magnetic field

Authors
Journal
Physica A Statistical Mechanics and its Applications
0378-4371
Publisher
Elsevier
Publication Date
Volume
392
Issue
9
Identifiers
DOI: 10.1016/j.physa.2013.01.021
Keywords
  • Baxter–Wu Model
  • Critical Phase Transition
  • Negative External Magnetic Field
  • Wang–Landau Algorithm
  • Critical Exponents
  • Universality Class

Abstract

Abstract In this work we study an unusual phase transition of the Baxter–Wu model in the presence of an external magnetic field. The model is pure Baxter–Wu, which means that only three-spin interactions are taken into account. We construct a phase diagram on the temperature–field plane based mainly on the singularities of the specific heat. These singularities are more clearly observed than those of the magnetic susceptibility which are used in existing works. We establish a discontinuity in the critical exponents when the field is changed from zero to negative.

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