最近邻强交换相互作用对spin-1纳米管热力学性质的影响  

Effects of strong exchange interactions on the thermodynamic properties of spin-1 nanotube

作　　者：李晓杰 李娜 王学文 唐顺磊 LI Xiao-Jie;LI Na;WANG Xue-Wen;TANG Shun-Lei(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》2021年第1期57-62,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最近邻强交换相互作用下Blume-Capel模型的内能、比热和自由能,得到了系统的内能、比热和自由能与最近邻强交换相互作用、晶场强度和温度的关系.结果表明:最近邻强交换相互作用、晶场强度和温度等诸多因素相互竞争,使系统表现出比J_(1)=J_(2)=J=1时的BC模型更为丰富的热力学性质;系统内能随温度的变化曲线表现出不连续性;比热随温度的变化出现奇异性;一定条件下,基态时的自由能会发生突变.The effective field theory is used to study the internal energy,specific heat and free energy of the Blume-Capel model in the nearest-neighbor strong exchange interaction on nanotubes,and the relationships between the internal energy,specific heat,free energy of the system and the strong exchange interaction,crystal field,temperature in the nearest-neighbor are obtained. The results show that the thermodynamic properties of the system are more abundant than those of the BC model at J_(1)=J_(2)= J = 1 due to the strong exchange interaction of the nearest neighbor,the strength of the crystal field and temperature. The curve of energy change with temperature shows discontinuity. The specific heat curve presents singularities. Under certain conditions,the free energy in the ground state will mutate.

关 键 词：最近邻强交换相互作用 有效场理论 BLUME-CAPEL模型 纳米管 

分 类 号：O65[理学—分析化学]