Two-layered Ising model with short-range two-spin interactions showing the critical behaviour of the Ashkin-Teller model

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, , Citation K Jungling 1976 J. Phys. C: Solid State Phys. 9 L139 DOI 10.1088/0022-3719/9/6/001

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1 Inst. fur Theoretische Phys., Univ. Heidelberg, Heidelberg, West Germany

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0022-3719/9/6/L139

Abstract

A two-layered Ising model is presented which maps to the Ashkin-Teller (AT) model (1943) for certain ratios of the two-spin couplings. Thus the model is able to exhibit the same critical exponents as the AT model, which are in general different from the usual Ising exponents; even continuous dependence of the critical exponents on the energy parameters is to be expected.

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