This article is cited in 1 paper

Onsager approximation and asymptotically exact solution of the Ashkin–Teller model

E. V. Gusev


Abstract: The Onsager approximation of the Ashkin–Teller model is constructed. In certain ranges of variation of the parameters of the model this approximation is asymptotically exact. In particular, for the isotropic model it gives the exact asymptotic behavior for the phase curves, and for the anisotropic model it gives the asymptotic behavior of the critical surfaces.

Received: 15.03.1989

 English version: Theoretical and Mathematical Physics, 1990, 83:1, 396–402

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