Spin Nematics and Magnetization Plateau Transition in Anisotropic Kagome Magnets

Damle, Kedar and Senthil, T (2006) Spin Nematics and Magnetization Plateau Transition in Anisotropic Kagome Magnets. In: Physical Review Letters, 97 (6). 067202-1.

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Abstract

We study S =1 kagome antiferromagnets with an isotropic Heisenberg exchange J and strong easyaxis single-ion anisotropy D. For $D \gg J$, the low-energy physics can be described by an effective S =1/2 XXZ model with antiferromagnetic $J_z\sim J$ and ferromagnetic $J_\bot \sim J^2/D$. Exploiting this connection, we argue that nontrivial ordering into a "spin-nematic" occurs whenever D dominates over J, and discuss its experimental signatures. We also study a magnetic field induced transition to a magnetization plateau state at magnetization 1/3 which breaks lattice translation symmetry due to ordering of the $S^z$ and occupies a lobe in the $B/J_z-J_z/J_\bot$ phase diagram.

Item Type:	Journal Article
Publication:	Physical Review Letters
Publisher:	American Physical Society
Additional Information:	Copyright of this article belongs to American Physical Society
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	11 Oct 2006
Last Modified:	19 Sep 2010 04:31
URI:	http://eprints.iisc.ac.in/id/eprint/8615

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