Parity-broken ground state for the spin-1 pyrochlore antiferromagnet

Details Parity-broken ground state for the spin-1 pyrochlore antiferromagnet Parity-broken ground state for the spin-1 pyrochlore antiferromagnet

2001-07-17

arxiv.org/abs/cond-mat/0107356v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, REVTeX(ver.3.1)

Scientific paper

10.1088/0953-8984/13/50/102

The ground-state properties of the spin-1 pyrochlore antiferromagnet are studied by applying the VBS-like tetrahedron-unit decomposition to the original spin system. The symmetrization required on every vertex is taken into account by introducing a ferromagnetic coupling. The pairwise effective Hamiltonian between the adjacent tetrahedrons is obtained by considering the next nearest neighbor and the third neighbor exchange interactions. We find that the transverse component of the spin chirality exhibits a long-range order, breaking the parity symmetry of the tetrahedral group, while the chirality itself is not broken.

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