True and quasi long-range order in the generalized $q$-state clock model

Details True and quasi long-range order in the generalized $q$-state clock model True and quasi long-range order in the generalized $q$-state clock model

2009-12-15

arxiv.org/abs/0912.2830v1

Phys. Rev. E 80, 060101 (2009)

Physics

Condensed Matter

Statistical Mechanics

9 pages, 11 figures

Scientific paper

10.1103/PhysRevE.80.060101

From consideration of the order-parameter distribution, we propose an observable which makes a clear distinction between true and quasi long-range orders in the two-dimensional generalized $q$-state clock model. Measuring this quantity by Monte Carlo simulations for $q=8$, we construct a phase diagram and identify critical properties across the phase-separation lines among the true long-range order, quasi long-range order, and disorder. Our result supports the theoretical prediction that there appears a discontinuous order-disorder transition as soon as the two phase-separation lines merge.

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