Phys. Rev. B 30, 5339–5341 (1984)Triangular lattice gas with first- and second-neighbor exclusions: Continuous transition in the four-state Potts universality classReceived 19 June 1984; published in the issue dated 1 November 1984 Using phenomenological renormalization (transfer-matrix scaling), we have reexamined the phase transition of a triangular lattice gas with particles having both nearest- and second-nearest-neighbor exclusions. Widely accepted classical studies indicated that disordering of the ordered ["p(2×2)"] state is first order. In contradiction, we show that the transition is second order; its exponents are consistent with the four-state Potts model universality class, in accord with its Landau-Ginzburg-Wilson Hamiltonian classification. © 1984 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.30.5339
DOI:
10.1103/PhysRevB.30.5339
PACS:
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