Triangular antiferromagnet with nonmagnetic impurities
Abstract
The effect of nonmagnetic impurities on the phase diagram of the classical Heisenberg antiferromagnet on a triangular lattice is investigated. We present analytical arguments confirmed by numerical calculations that at zero temperature vacancies stabilize a conical state providing an example of "order by quenched disorder" effect. Competition between thermal fluctuations and the site disorder leads to a complicated H-T phase diagram, which is deduced from the classical Monte Carlo simulations for a representative vacancy concentration. For the XY triangular-lattice antiferromagnet with in-plane external field nonmagnetic impurities stabilize the fan-like spin structure. We also briefly discuss the effect of quantum fluctuations.
Cite
@article{arxiv.1311.4526,
title = {Triangular antiferromagnet with nonmagnetic impurities},
author = {V. S. Maryasin and M. E. Zhitomirsky},
journal= {arXiv preprint arXiv:1311.4526},
year = {2013}
}
Comments
5 pages, as published