UnionJack晶格上混合自旋模型临界温度与自旋耦合作用的关系  

THE RELATION BETWEEN CRITICAL TEMPERATURE AND THE COUPLING CONSTANTS FOR UNION JACK LATTICE MIXED-SPIN MODEL

作　　者：刘策军[1] 

机构地区：[1]华南农业大学基础部

出　　处：《华南师范大学学报（自然科学版）》1995年第2期75-80,共6页Journal of South China Normal University(Natural Science Edition)

摘　　要：本文研究了ｕｎｉｏｎｊａｃｋ晶格上各向同性的混合自旋模型临界温度与自旋耦合作用的关系。文中分别采用平均场近似和自由费密近似两种方法求解。在耦合常数简化为正方晶格上的混合自旋模型时，得到与其它解符合较好的临界温度。In this paper a mixed-spin model on the union jack lattice with isotropic coupling interactionsand the function between critical temperature and the coupling constants are considered,Themean field and free fermion approximations are applied to this medel.When the couplingconstants are simplified as mixed-spin model in a square lattice, in good agreement with otherapproaches, the solution is obtained.

关 键 词：晶格 混合自旋模型 临界温度 自旋耦合作用 

分 类 号：O414.2[理学—理论物理]