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The phase diagram of the 2D Ising model with anisotropic next-nearest-neighbor and four-spin interactions

✍ Scribed by Fugao Wang; Masuo Suzuki

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 479 KB
Volume: 230
Category: Article
ISSN: 0378-4371
DOI: 10.1016/0378-4371(96)00116-1

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✦ Synopsis

In the present paper, the two-dimensional Ising model with anisotropic nearest-neighbor, nextnearest-neighbor and four-spin interactions has been studied. The ground states and energy of the model have been obtained. The model is equivalent to an eight-vertex model on its dual lattice. In some special cases, the model can be solved exactly as a zero-field eight-vertex model or a free-fermion model. Explicit phase diagrams are obtained exactly.

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