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Phase transition in the ±J Ising-spin-glass model

Morgenstern, Ingo
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Date of publication of this fulltext: 09 Aug 2010 12:25


Abstract

The two-dimensional ±J model (antiferromagnetic and ferromagnetic bonds at random) is studied by transfer-matrix and Monte Carlo calculations. Large clusters of spins pointing in one direction are found for 0.12<x≤0.16 (x being the concentration of negative bonds). Evidence against a phase transition at finite temperature is found by investigating the correlation function 〈S0SR〉2..


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