Theory of Magnetization Plateaux in the Shastry-Sutherland Model

被引：69

作者：

Dorier, J. ^{[1
]}

Schmidt, K. P. ^{[2
]}

Mila, F. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Theoret Phys, CH-1015 Lausanne, Switzerland

[2] Lehrstuhl Theoret Phys, D-44221 Dortmund, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.101.250402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Motivated by the remarkable properties of SrCu(2)(BO(3))(2) in a magnetic field, we use perturbative continuous unitary transformations to determine the magnetization plateaux of the Shastry-Sutherland model, unveiling an unexpected sequence of plateaux progressively appearing at 2/9, 1/6, 1/9, and 2/15 upon increasing the interdimer coupling. We predict that a 1/6 plateau should be present in SrCu(2)(BO(3))(2), even if residual interactions beyond the Shastry-Sutherland are strong enough to modify the other plateaux below 1/3. The method is extended to calculate the magnetization profile within the plateaux, leading to a local structure around triplons that agrees with NMR results on SrCu(2)(BO(3))(2).

引用

页数：4

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