Quantum phase transitions of the S=1 Shastry-Sutherland model

被引：5
|
作者：
Koga, A
Kawakami, N
Sigrist, M
机构：
[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan
[2] ETH Honggerberg, CH-8093 Zurich, Switzerland
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2003年 / 72卷 / 04期
关键词：
Shastry-Sutherland model; valence bond solid; exact diagonalization; Ising expansion;
D O I：
10.1143/JPSJ.72.938
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate quantum phase transitions of the two-dimensional S = I Shastry-Sutherland model, which is characterized by the frustrated orthogonal-dimer structure, by means of the exact diagonalization method and the Ising-type series expansion method. We clarify how distinct spin gap phases realized in the chain system are adiabatically connected to those in the two-dimensional Shastry-Sutherland model. The effect of single-ion anisotropy is also discussed.
引用
收藏
页码：938 / 942
页数：5
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