Abstract
The interfacial free energy of a two-dimensional Ising model is calculated by using various renormalization group schemes. The results obtained are quantitatively consistent with known exact results. In addition, a general discussion of various drawbacks within different renormalization group approximations is given. The best result are obtained with the 4×4 finite cluster approximation, while the Migdal-Kadanoff approximation seems to be inherently unsuitable for calculation of interfacial properties.
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Bilalbegović, G., Švrakić, N.M. Interfacial free energy of the two-dimensional Ising model from the renormalization group. J Stat Phys 46, 777–787 (1987). https://doi.org/10.1007/BF01013385
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DOI: https://doi.org/10.1007/BF01013385