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Pair correlations in the cluster variation approximation

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  • Sanchez, J.M.

Abstract

The cluster variation method is used to obtain approximate free energy functions for a binary system in an inhomogeneous field, in order to calculate the Fourier transform of the pair correlation functions. In the two-dimensional square lattice, using the nearest-neighbors square as the basic cluster, the correlation functions are correctly given up to the order 7 in the inverse temperature. The effect of second-neighbor pairs and many-body interactions is investigated.

Suggested Citation

  • Sanchez, J.M., 1982. "Pair correlations in the cluster variation approximation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 111(1), pages 200-216.
    • Handle: RePEc:eee:phsmap:v:111:y:1982:i:1:p:200-216
    DOI: 10.1016/0378-4371(82)90089-9
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    Cited by:

    1. Guerrero, Alejandra I. & Stariolo, Daniel A., 2017. "Pair correlations and structure factor of the J1-J2 square lattice Ising model in an external field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 466(C), pages 596-606.

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