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- W2020606488 abstract "The number and types of phase transitions occurring in the two-dimensional fully frustrated XY model have remained controversial in spite of over a decade of attention. In this study, we have developed a Monte Carlo hard-spin mean-field approach for models with a continuous spin variable and applied it to this system. From our calculations of the chirality, helicity modulus, specific heat, and sublattice magnetizations, we find that reflection and rotational symmetries are broken at the same temperature. The chirality, order parameter for the reflection symmetry breaking, exhibits power-law dependence on T−Tc with a critical exponent of 0.246±0.006. This result is decisively different from the mean-field value of 0.500, which would be obtained for a transition in the Ising universality class using this method. This finding enables us to rule out the possibility of two separate transitions, too closely spaced in temperature to be resolved by our calculation. The magnitude of the magnetization on each sublattice also shows power-law behavior as a function of temperature in the critical region, with a critical exponent of 0.126±0.002." @default.
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- W2020606488 date "1996-04-15" @default.
- W2020606488 modified "2023-09-27" @default.
- W2020606488 title "Criticality of the fully frustrated <i>XY</i> model: A study using Monte Carlo hard-spin mean-field theory (abstract)" @default.
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- W2020606488 doi "https://doi.org/10.1063/1.362052" @default.
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