镶嵌正方晶格上具有次近邻耦合作用Ising模型的临界性质  

CRITICAL PROPERTY TO THE ISING MODEL WITH NEXT-NEAREST-NEIGHBOR INTERACTIONS ON A DECORATED SQUARE LATTICE

作　　者：孙春峰[1] 曾庆栋[1] 

机构地区：[1]孝感学院物理系,湖北孝感432000

出　　处：《低温物理学报》2012年第1期50-53,共4页Low Temperature Physical Letters

基　　金：湖北省教育厅科学技术研究重点项目(批准号:D200726001)资助的课题~~

摘　　要：采用部分格点自旋消约变换,将镶嵌正方晶格上具有最近邻耦合作用K1和次近邻耦合作用K2的Ising模型变换成等效的具有最近邻、次近邻和四体耦合作用的正方Ising晶格.发现系统的临界点在(K1C,K2C)=(0.5125,0.2134),由此决定系统的临界温度,幷讨论了系统的普适性.Using the decimation technique, a square decorated Ising lattice with two kinds of interactionsK1 and K2 was transformed into a regular square Ising lattice With nearest-neighbor, next-nearest-neighbor, and four-spin interactions. The critical fixed point was found at K3C= 0. 5125 , and K2C= 0. 2134 , which determines the critical tem- perature of the system. The universality was discussed in this system.

关 键 词：镶嵌正方晶格 ISING模型 临界点 普适性 

分 类 号：O414.13[理学—理论物理]