Magnetic and nematic orderings in spin-1 antiferromagnets with single-ion anisotropy
Strongly Correlated Electrons
2012-12-04 v3 Statistical Mechanics
Abstract
We study a spin-one Heisenberg model with exchange interaction, J, uniaxial single-ion exchange anisotropy, D, and Zeeman coupling to a magnetic field, B, parallel to the symmetry axis. We com- pute the (D/J,B/J) quantum phase diagram for square and simple cubic lattices by combining an- alytical and Quantum Monte Carlo approaches, and find a transition between XY-antiferromagnetic and ferronematic phases that spontaneously break the U(1) symmetry of the model. In the language of bosonic gases, this is a transition between a Bose-Einstein condensate (BEC) of single bosons and a BEC of pairs. Our work opens up new avenues for measuring this transition in real magnets.
Keywords
Cite
@article{arxiv.1209.0688,
title = {Magnetic and nematic orderings in spin-1 antiferromagnets with single-ion anisotropy},
author = {Keola Wierschem and Yasuyuki Kato and Yusuke Nishida and Cristian D. Batista and Pinaki Sengupta},
journal= {arXiv preprint arXiv:1209.0688},
year = {2012}
}