三维键无规Blume-Capel模型的相图研究

Phase Diagrams of Three-dimensional Random Bond Blume-Capel Model

在有效场框架下,运用切断近似的方法,对三维键无规Blume-Capel模型(BCM)的相图进行了研究.具体分析了三临界点(TCP)随两种无序因子的变化关系,讨论了稀疏晶场和键无规对相图特征的具体影响,并给出相应的相图.

Within the framework of an effective field theory, the phase diagrams of three--dimensional random bond Blume--Capel model （BCM） have been studied By using a cutting approximation. The trajectory of the tricritical point （TCP） in the phase space as a function of the disorder parameter is presented. The effect of the random bond and anisotropy dilution on the phase diagrams is discussed and we give the more detailed descriptions