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Planar quasiperiodic Ising models
DOI:10.1016/S0921-5093(00)01153-9.png)
摘要
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We investigate zero-field Ising models on periodic approximants of planar quasiperiodic tilings by means of partition function zeros and high-temperature expansions. These are obtained by employing a determinant expression for the partition function. The partition function zeros in the complex temperature plane yield precise estimates of the critical temperature of the quasiperiodic model. Concerning the critical behaviour, our results are compatible with Onsager universality, in agreement with the Harris-Luck criterion based on scaling arguments. (C) 2000 Elsevier Science B.V. All rights reserved.
Keyword:
quasicrystals
Ising model
partition function zeros
phase transition
critical point properties
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