Effective Theory of Magnetization Plateaux in the Shastry-Sutherland Lattice

被引：48
作者：
Abendschein, A. [1 ,2 ]
Capponi, S. [1 ,2 ]
机构：
[1] Univ Toulouse, Phys Theor Lab, UPS, IRSAMC, F-31062 Toulouse, France
[2] CNRS, LPT, IRSAMC, F-31062 Toulouse, France
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.101.227201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We use the nonperturbative Contractor-Renormalization method (CORE) in order to derive an effective model for triplet excitations on the Shastry-Sutherland lattice. For strong enough magnetic fields, various magnetization plateaux are observed, e.g., at 1/8, 1/4, 1/3 of the saturation, as found experimentally in a related compound. Moreover, other stable plateaux are found at 1/9, 1/6, or 2/9. We give a critical review of previous works and try to resolve some apparent inconsistencies between various theoretical approaches.
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页数：4
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