We study S=1 kagome antiferromagnets with isotropic Heisenberg exchange J and strong easy axis single-ion anisotropy D. For D≫J, the low-energy physics can be described by an effective S=1/2XXZ model with antiferromagnetic Jz∼J and ferromagnetic J⊥∼J2/D. Exploiting this connection, we argue that non-trivial 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 Sz and occupies a lobe in the B/Jz-Jz/J⊥ phase diagram.
@article{arxiv.cond-mat/0602671,
title = {Spin nematics and magnetization plateau transition in anisotropic Kagome magnets},
author = {Kedar Damle and T. Senthil},
journal= {arXiv preprint arXiv:cond-mat/0602671},
year = {2009}
}