Collinear ordering of easy-axis triangular lattice antiferromagnets

Details Collinear ordering of easy-axis triangular lattice antiferromagnets Collinear ordering of easy-axis triangular lattice antiferromagnets

2008-05-17

arxiv.org/abs/0805.2658v1

published version: Phys. Rev. Lett. {\bf 102}, 227001 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2-column format, 3 .eps figures

Scientific paper

Antiferromagnetically coupled moments on the frustrated triangular lattice typically order in a coplanar state at low temperature. Here, we demonstrate that the presence of not-very-large easy axis single ion anisotropy leads to an interesting orientationally ordered collinear state in triangular lattice antiferromagnets with moments $S \ge 3/2$. This ordered state breaks the symmetry of $\pi/3$ rotations about a lattice site, while leaving intact the translational symmetry of the lattice.

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