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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)=(O.5125,0.2134),由此决定系统的临界温度,并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.

参考文献

[1] 孙春峰,孔祥木.镶嵌正方晶格上Ising模型的近似解[J].低温物理学报,2010(06):441-444.
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