Quantum XY spin-glass model with ferromagnetic couplings and plane Dzyaloshinski-Moriya interactions

被引:1
作者
Shang, YM
Yi, L
Yao, KL
机构
[1] HONG KONG UNIV SCI & TECHNOL,DEPT PHYS,KOWLOON,HONG KONG
[2] ACAD SINICA,INT CTR MAT PHYS,SHENYANG 110015,PEOPLES R CHINA
关键词
D O I
10.1088/0253-6102/27/1/21
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In the generalized quantum replica symmetric approximation, a quantum XY spin-glass model with ferromagnetic coupling and planar Dzyaloshinski-Mariya (DM) interactions is investigated theoretically. Entropy and specific heat are calculated numerically as well as spin self-interactions and spin-glass order parameters for spin S = 1. It is found that the double-cusp of the specific heat, which corresponds to the collinear ferromagnetic and the paramagnetic ferromagnetic transitions respectively, coincides completely due to DM-anisotropy interactions. Additionally, the local susceptibility and the spontaneous magnetization are evaluated numerically.
引用
收藏
页码:21 / 26
页数:6
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