Exact multicritical behaviour of the Potts model
- 7 February 1993
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 26 (3) , 477-493
- https://doi.org/10.1088/0305-4470/26/3/013
Abstract
A two-dimensional q-state Potts model with vacancies and four-spin interactions is studied. The parameter space of the model contains a critical and a tricritical manifold. Moreover for 0<or=q<or=9/4 a multicritical point is found which is the locus where the tricritical transition changes from first- to second-order. At this multicritical point, which can be located exactly, the model is solvable. The authors compute the value of the central charge and a number of critical exponents.Keywords
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