Spin-Lattice-Coupled Order in Heisenberg Antiferromagnets on the Pyrochlore Lattice.

@article{Aoyama2016SpinLatticeCoupledOI,
  title={Spin-Lattice-Coupled Order in Heisenberg Antiferromagnets on the Pyrochlore Lattice.},
  author={Kazushi Aoyama and Hikaru Kawamura},
  journal={Physical review letters},
  year={2016},
  volume={116 25},
  pages={
          257201
        }
}
Effects of local lattice distortions on the spin ordering are investigated for the antiferromagnetic classical Heisenberg model on the pyrochlore lattice. It is found by Monte Carlo simulations that the spin-lattice coupling (SLC) originating from site phonons induces a first-order transition into two different types of collinear magnetic ordered states. The state realized at the stronger SLC is cubic symmetric characterized by the magnetic (1/2,1/2,1/2) Bragg peaks, while that at the weaker… 
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