N-color Ashkin-Teller Model in two dimensions: Solution in the large-N limit

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The N-color Ashkin-Teller model is solved exactly in the large-N limit in two dimensions. The phase diagram is found. It is shown that for positive four-spin coupling the transition is first order while for negative four-spin coupling the transition is continuous and Ising type. The specific heat near the second-order transition is calculated and it is found to be finite at the transition because of large corrections to scaling. The latent heat and correlation length at the first-order transition are also calculated.

Original languageEnglish (US)
Pages (from-to)1967-1970
Number of pages4
JournalPhysical review letters
Issue number21
StatePublished - Jan 1 1984


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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