准周期量子伊辛模型的居里温度和磁化强度(英文)  

Curie Temperature and Magnetization Profiles of Quasiperiodic Layer Quantum Ising Model

作　　者：刘方爱[1] 类淑国[1] 

机构地区：[1]南京工业大学理学院,江苏南京210009

出　　处：《南京师大学报（自然科学版）》2004年第2期46-50,共5页Journal of Nanjing Normal University(Natural Science Edition)

摘　　要：利用平均场理论研究了一维横场中准周期层状量子伊辛模型性质 ,得到系统的居里温度方程 ,发现在自旋链足够长的情况下其居里温度回归到周期系统 .并计算了系统的平均磁化强度随长度的变化 .Under the approximation of the mean field, Curie temperature and magnetization profiles of layer quantum Ising model with a transverse field were studied. The Curie temperature equation of the model was derived. The dependence of Curie temperature on the Fibonacci number n and the external field is given. It is found that the Curie temperature of quasiperiodic models is like to that of periodic models if the chain is long enough. With the same framework, the magnetization profiles of the system was also calculated. The method proposed here can be applied to other quasiperiodic model.

关 键 词：准周期 量子伊辛模型 居里温度 磁化强度 自旋链 

分 类 号：O413[理学—理论物理] O441[理学—物理]