Tricriticality of interacting hard squares: Some exact results

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Baxter has solved a restricted class of square lattice gas models with nearest-neighbor exclusion (thus "hard squares") and next-nearest-neighbor interactions. Arguments are presented which demonstrate that the subspace spanned by his exact solution contains the line of tricritical points and the associated surface of first-order transitions of hard squares with attractive next-nearest-neighbor interactions. The tricritical exponents so identified confirm those obtained by Nienhuis for a dilute Ising model.

Original languageEnglish (US)
Pages (from-to)1121-1124
Number of pages4
JournalPhysical review letters
Issue number16
StatePublished - 1982
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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