Spin-Polarization of Ferroelectric Supperlattice with Spin-1/2 Transverse Ising Model  

作　　者：WANG Chun-Dong TENG Bao-Hua LU Zhen-Zhen KWOK So-Ying 

机构地区：[1]Center of Super-Diamond and Advanced Films （COSDAF） and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China [2]School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

出　　处：《Communications in Theoretical Physics》2011年第6期1024-1028,共5页理论物理通讯（英文版）

摘　　要：By using the simple decoupling approximation to Fermi-type Green＇s function for the transverse Ising model under pseudospin theory, we systemically study the influence of different exchange interactions （transverse fields） of the two distinct materials on the polarization and Curie temperature of finite alternating superlattice. Meanwhile, we analyze the effect of the whole parameters of the top surface, present their influence on the polarization of each layer （including the mean polarization of the whole ferroeleetric superlattiee） and on the Curie temperature. The results show the ratio of the exchange interactions （the transverse fields）, which are of the two alternating materials have deeply impact on the polarization and Curie temperature of the supperlattice. Moreover, the top surface also has great influence on the whole ferroelectric superlattice.

关 键 词：ferroelectric superlattice SPIN-POLARIZATION 

分 类 号：O414.2[理学—理论物理] TN6[理学—物理]