外壳层最近邻交换相互作用对 Blume-Capel模型相变行为的影响  

The effect of the closest neighbor exchange interaction on the phase transition behavior of the Blume-Capel model

作　　者：李晓杰 王义荣 王小霞 LI Xiao-Jie;WANG Yi-Rong;WANG Xiao-Xia(Qilu Institute of Technology,Jinan 250200,China)

机构地区：[1]齐鲁理工学院,济南250200

出　　处：《原子与分子物理学报》2020年第5期739-744,共6页Journal of Atomic and Molecular Physics

基　　金：齐鲁理工学院校级课题(JG201859)。

摘　　要：利用有效场理论研究了纳米管上双模随机晶场中混合自旋Blume-Capel模型的相变行为.结果表明,系统相变行为与取值概率、晶场强度比值、晶场参数、温度以及外壳层最近邻交换相互作用密切相关.取值概率、晶场强度比值、晶场参数和外壳层最近邻交换相互作用等诸多因素相互竞争,影响系统的一级和二级相变以及临界点.The phase transition behavior of the mixed spin Blume-Capel model in a two-mode random crystal field on a nanotube is studied by using the effective field theory. The results show that the phase transition behavior of the system is closely related to the probability of value taking, crystal field strength ratio, crystal field parameters, temperature and the nearest neighbor exchange interaction of the shell layer. Many factors such as the probability of selection, crystal field strength ratio, crystal field parameters and the closest neighbor exchange interaction of shell layer compete with each other, affecting the first-order and second-order phase transitions and critical points of the system.

关 键 词：最近邻交换相互作用 相变行为 有效场理论 BLUME-CAPEL模型 纳米管 

分 类 号：O65[理学—分析化学]