Magnetization plateaus of SrCu_2(BO_3)_2 from a Chern-Simons theory
Strongly Correlated Electrons
2009-11-07 v1 Mesoscale and Nanoscale Physics
Abstract
The antiferromagnetic Heisenberg model on the frustrated Shastry-Sutherland lattice is studied by a mapping onto spinless fermions carrying one quantum of statistical flux. Using a mean-field approximation these fermions populate the bands of a generalized Hofstadter problem. Their filling leads to the magnetization curve. For SrCu_2(BO_3)_2 we reproduce plateaus at 1/3 and 1/4 of the saturation moment and predict a new one at 1/2. Gaussian fluctuations are shown to be massive at these plateau values.
Keywords
Cite
@article{arxiv.cond-mat/0102377,
title = {Magnetization plateaus of SrCu_2(BO_3)_2 from a Chern-Simons theory},
author = {G. Misguich and Th. Jolicoeur and S. M. Girvin},
journal= {arXiv preprint arXiv:cond-mat/0102377},
year = {2009}
}
Comments
4 pages, 5 figures