Theory of magnetization plateaux in the Shastry-Sutherland model
Strongly Correlated Electrons
2014-09-29 v1
Abstract
Using perturbative continuous unitary transformations, we determine the long-range interactions between triplets in the Shastry-Sutherland model, and we show that an unexpected structure develops at low magnetization with plateaux progressively appearing at 2/9, 1/6, 1/9 and 2/15 upon increasing the inter-dimer coupling. A critical comparison with previous approaches is included. Implications for the compound SrCu(BO) are also discussed: we reproduce the magnetization profile around localized triplets revealed by NMR, we predict the presence of a 1/6 plateau, and we suggest that residual interactions beyond the Shastry-Sutherland model are responsible for the other plateaux below 1/3.
Keywords
Cite
@article{arxiv.0806.3406,
title = {Theory of magnetization plateaux in the Shastry-Sutherland model},
author = {J. Dorier and K. P. Schmidt and F. Mila},
journal= {arXiv preprint arXiv:0806.3406},
year = {2014}
}
Comments
5 pages, 6 figures