Correlation-induced reentrant spin-glass behavior in an Ising model with random interactions

Abstract
An Ising spin-glass calculation is presented showing that stable "reentrant" spin-glass behavior, which is absent in mean-field theory, occurs when local correlations are taken into account. The method is a simple Kikuchi approximation starting from the exactly soluble classical spin-glass model proposed by van Hemmen. The resulting phase diagram is in good agreement with experiment.

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