Critical Exponents Can Be Different on the Two Sides of a Transition: A Generic Mechanism.

@article{Leonard2015CriticalEC,
  title={Critical Exponents Can Be Different on the Two Sides of a Transition: A Generic Mechanism.},
  author={F. Leonard and B. Delamotte},
  journal={Physical review letters},
  year={2015},
  volume={115 20},
  pages={
          200601
        }
}
We present models where γ(+) and γ(-), the exponents of the susceptibility in the high- and low-temperature phases, are generically different. In these models, continuous symmetries are explicitly broken down by discrete anisotropies that are irrelevant in the renormalization-group sense. The Z(q)-invariant models are the simplest examples for two-component order parameters (N=2) and the model with icosahedral symmetry for N=3. We accurately compute γ(+)-γ(-) as well as the ratio ν/ν' of the… Expand
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