Monte Carlo Study of Planar Rotator Model with Weak Dzyaloshinsky-Moriya Interaction

作     者：SUN Yun-Zhou LIU Hui-Ping YI Lin 

作者机构：Department of Physics and State Key Laboratory of Laser Technology~ Huazhong University of Science and TechnologyWuhan 430074 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2006年第46卷第4X期

页      面：663-667页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：The project supported by Natural Science Foundation of Hubei Province of China under Grant No. 2003ABA004. We are indebted to professor Wang Jian-Sheng for his stimulating discussions 

主　　题：Monte Carlo method Berezinskii-Kosterlitz-Thouless phase transition Dzyaloshinsky-Moriya interaction XY model 

摘      要：With the help of an improvement Monte Carlo method, the Berezinskii-Kosterlitz-Thouless phase transition arising in two-dimensional planar rotator model with weak Dzyaloshinsky-Moriya （DM） interaction is investigated. The effects of the DM interaction on specific heat, susceptibility, and magnetization are simulated. The critical temperature of transitions is determined by the so-called Binder cumulant and the susceptibility of finite-size scaling. We find that the chiral Z2 symmetry reduced by the DM interactions plays an important role in a two-dimensional XY spin system, typically, the critical temperature is sensitive to weak DM spin couplings.