Magnetization plateaus of SrCu_2(BO_3)_2 from a Chern-Simons theory

Preprint

21 February 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0102377

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

MAGNETIZATION PLATEAUS
ANTIFERROMAGNETIC
SIMONS THEORY
CHERN SIMONS
HEISENBERG
FERMIONS
SRCU_2
BO_3

All Related Versions

Version 1, 2001-02-21, ArXiv
Published version: Physical Review Letters, 87 (9), 097203.

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