Abstract
The Ising model on a two-dimensional Penrose tiling is studied by means of the Migdal-Kadanoff scheme. This approximate renormalization method closely follows the inflation rules of the tiling, which are easily described in terms of Robinson triangles, and lead to the consideration of four types of nearest neighbor couplings. The ferromagnetic phase transition is similar to the usual one encountered on periodic lattices. When the couplings have both signs, the presence of frustration without randomness yields a fairly intricate phase diagram, essentially made up of two regions with a very complicated border. Region I consists of “quasiferromagnetic” models, which exhibit long-range order below some finite critical temperature. The models of region II are paramagnetic at nonzero (low) temperature, but may become ordered (reen-trant phases) in a higher temperature range.
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Godréche, C., Luck, J.M. & Orland, H. Magnetic phase structure on the Penrose lattice. J Stat Phys 45, 777–800 (1986). https://doi.org/10.1007/BF01020574
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DOI: https://doi.org/10.1007/BF01020574