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

@article{Baek2009TrueAQ,
  title={True and quasi-long-range order in the generalized q-state clock model.},
  author={Seung Ki Baek and Petter Minnhagen and Beom Jun Kim},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2009},
  volume={80 6 Pt 1},
  pages={
          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… 

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