Magnetization plateaus and sublattice ordering in easy axis Kagome lattice antiferromagnets

Abstract

We study kagome lattice antiferromagnets where the effects of easy axis single-ion anisotropy ($D$) dominates over the Heisenberg exchange $J$. For $S\ge 3/2$, 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 $J^3/D^2\lesssim B\lesssim JS$ along the easy axis. The fully equilibriated system at low temperature on this plateau develops an unusual {\em 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.

published version

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• Cluster algorithms for frustrated two dimensional Ising antiferromagnets via dual worm constructions
• Semiclassical spin liquid state of easy axis Kagome antiferromagnets
• Ordered Phases of the Anisotropic Kagome Lattice Antiferromagnet in a Field
• Quantum Melting of Valence Bond Crystal Insulators and Novel Supersolid Phase at Commensurate Density
• Unconventional magnets in external magnetic fields
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• Honeycomb-lattice Gamma model in a magnetic field: hidden Néel order and spin-flop transition
• High magnetic field phase diagram and weak FM breaking in (Ni0.93Co0.07)3V2O8