Magnetization plateaus and sublattice ordering in easy-axis kagome lattice antiferromagnets

Sen, Arnab ; Damle, Kedar ; Vishwanath, Ashvin (2008) Magnetization plateaus and sublattice ordering in easy-axis kagome lattice antiferromagnets Physical Review Letters, 100 (9). Article ID 097202. ISSN 0031-9007

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Official URL: http://journals.aps.org/prl/abstract/10.1103/PhysR...

Related URL: http://dx.doi.org/10.1103/PhysRevLett.100.097202

Abstract

We study kagome lattice antiferromagnets where the effects of easy-axis single-ion anisotropy (D) dominates over the Heisenberg exchange J. For S≥3/2, virtual quantum fluctuations help lift the extensive classical degeneracy. We demonstrate the presence of a one-third magnetization plateau for a broad range of magnetic fields J3/D2≲B≲JS along the easy axis. The fully equilibrated system at low temperature on this plateau develops an unusual nematic order that breaks sublattice rotation symmetry but not translation symmetry; however, extremely slow dynamics associated with this ordering is expected to lead to glassy freezing of the system on intermediate time scales.

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ID Code:103101
Deposited On:09 Mar 2018 11:30
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