Phase diagram of generalized fully frustrated XY model in two dimensions

@article{Minnhagen2007PhaseDO,
  title={Phase diagram of generalized fully frustrated XY model in two dimensions},
  author={Petter Minnhagen and Beom Jun Kim and Sebastian Bernhardsson and Gerardo Cristofano},
  journal={Physical Review B},
  year={2007},
  volume={76},
  pages={224403}
}
It is shown that the phase diagram of the two-dimensional generalized fully-frustrated XY model on a square lattice contains a crossing of the chirality transition and the Kosterlitz-Thouless (KT) transition, as well as a stable phase characterized by a finite helicity modulus $\Upsilon$ and an unbroken chirality symmetry. The crossing point itself is consistent with a critical point without any jump in $\Upsilon$, with the size ($L$) scaling $% \Upsilon\sim L^{-0.63}$ and the critical index… 

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