Possible Inversion Symmetry Breaking in the S=1/2 Pyrochlore Heisenberg Magnet.

  title={Possible Inversion Symmetry Breaking in the S=1/2 Pyrochlore Heisenberg Magnet.},
  author={Imre Hagym{\'a}si and Robin Sch{\"a}fer and Roderich Moessner and David J. Luitz},
  journal={Physical review letters},
  volume={126 11},
We address the ground-state properties of the long-standing and much-studied three-dimensional quantum spin liquid candidate, the S=1/2 pyrochlore Heisenberg antiferromagnet. By using SU(2) density-matrix renormalization group (DMRG), we are able to access cluster sizes of up to 128 spins. Our most striking finding is a robust spontaneous inversion symmetry breaking, reflected in an energy density difference between the two sublattices of tetrahedra, familiar as a starting point of earlier… 

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