Comment on `Six-state clock model on the square lattice: Fisher zero approach with Wang-Landau sampling'

Abstract

Hwang in [Phys. Rev. E 80, 042103 (2009)] suggested that the two transitions of the six-state clock model on the square lattice are not of the Kosterlitz-Thouless type. Here we show from simulations thatat the upper transition, the helicity modulus does make a discontinuous jump to zero. This gives strong evidence for a Kosterlitz-Thouless transition.

4 pages, 4 figures

References in corpus (2)

• Direct Evidence of the Discontinuous Character of the Kosterlitz-Thouless Jump
• True and quasi long-range order in the generalized $q$-state clock model

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