Locus of the tricritical transition in a two-dimensional q-state Potts model

Bernard Nienhuis

Physica A: Statistical Mechanics and its Applications, 1991, vol. 177, issue 1, 109-113

Abstract: A simple two-dimensional Potts model with vacancies is introduced. The phase transition between paramagnetic and ferromagnetic is located by simple symmetry arguments. It is shown that the transition has a continuous and a first-order segment, separated by a tricritical transition. The locus of the tricritical point is determined by a transformation of the partition sum into that of an O(n) model. At the tricritical point and at some of the critical points this Potts model is soluble.

Date: 1991
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:177:y:1991:i:1:p:109-113

DOI: 10.1016/0378-4371(91)90141-X

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