一种推广的混合自旋模型的临界温度曲线  

CRITICAL TEMPERATURE CURVES FOR THE GENERALIZED MIXED SPIN MODEL

作　　者：王福高 胡嘉桢 

机构地区：[1]上海交通大学应用物理系凝聚态物理研究所,上海200030

出　　处：《物理学报》1993年第7期1179-1187,共9页Acta Physica Sinica

摘　　要：本文提出了一种union jack晶格上推广的混合自旋模型。文中分别用平均场近似、自由费密近似及同普适类等标度变换理论对该模型进行了研究,分别得到了相互之间符合较好的临界温度曲线,并对不同处理方法进行了比较。在简化为特定可解模型时,得到与严格解一致的临界点。In this paper, we propose a generalized mixed spin model on the union jack lattice. The mean field. free-fermion approximations and equiscale transformation in the same universality class method are applied to this model. The critical temperature curves obtained by different methods agree with each other quite well. We also compare the three different methods. In some special cases, the same critical points as in exactly solved models are obtained.

关 键 词：混合自旋模型 自旋 临界温度 

分 类 号：O731[理学—晶体学]