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Surface reentrance in the semi-infinite spin-1 Ising models

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  • Buzano, Carla
  • Pelizzola, Alessandro

Abstract

The critical behavior of the semi-infinite Blume-Capel and Blume-Emery-Griffiths models is investigated in the pair approximation of the cluster variation method. Equations for bulk and surface order parameters and n.n. correlation functions are given, from which analytical expressions for the second order bulk and surface critical temperatures are derived. The phase diagrams of the Blume-Capel model are classified, and the existence of a surface first-order transition is discussed. This transition is shown to be, under certain conditions, slightly reentrant, and the behavior of the surface order parameters and correlation functions is given for such a case. The extension of our results to the Blume-Emery-Griffiths model is briefly discussed.

Suggested Citation

  • Buzano, Carla & Pelizzola, Alessandro, 1993. "Surface reentrance in the semi-infinite spin-1 Ising models," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 195(1), pages 197-214.
    • Handle: RePEc:eee:phsmap:v:195:y:1993:i:1:p:197-214
    DOI: 10.1016/0378-4371(93)90263-4
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    1. Buzano, Carla & Pelizzola, Alessandro, 1995. "New topologies in the phase diagram of the semi-infinite Blume-Capel model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 216(1), pages 158-168.

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