SU(4) theory for spin systems with orbital degeneracy

被引：251
作者：
Li, YQ [1 ]
Ma, M
Shi, DN
Zhang, FC
机构：
[1] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA
[2] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
[3] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 210016, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.81.3527
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The isotropic limit of spin systems with orbital degeneracy has global SU(4) symmetry. On many 2D lattices, the ground state does not possess long-range order, which may explain the observed spin liquid properties of LiNiO2. In the SU(4) Neel-ordered state, spin-spin correlations can be antiferromagnetic between two neighboring sites with parallel magnetic moments.
引用
收藏
页码：3527 / 3530
页数：4
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