Abstract:In this paper, we use the dimer method to obtain the free energy of Ising models consisting of repeated horizontal strips of width m connected by sequences of vertical strings of length n mutually separated by distance N , with N arbitrary, to investigate the effects of connectivity and proximity on the specific heat. The decoration method is used to transform the strings of n + 1 spins interacting with their nearest neighbors with coupling J into a pair with coupling Ĵ between the two spins. The free energy p… Show more
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