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Phase Diagram and Critical Behavior of the Spin-1 Baxter-Wu Model with a Crystal Field

M. L. M. Costa·J. C. Xavier·J. A. Plascak
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Abstract

The phase diagram and critical behavior of the spin-1 Baxter-Wu model with a crystal field in two dimensions is explored by renormalization group, conventional finite-size scaling and conformal invariance techniques. We found that the phase diagram of this model is qualitatively the same as that of the dilute 4-states Potts model, presenting a multi-critical point for a finite value of the crystal field, in disagreement with previous work based on finite-size calculations. However, our results indicate that the critical exponents vary continuously along the second-order transition line, differently from the expected behavior of the dilute 4-states Potts model.

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M. L. M. Costa, J. C. Xavier, J. A. Plascak. 2004-03-17. Phase Diagram and Critical Behavior of the Spin-1 Baxter-Wu Model with a Crystal Field. https://doi.org/10.1103/physrevb.69.104103

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