Study of Depolarization Field Influence on Ferroelectric Films Within Transverse Ising Model
An improved transverse Ising model is proposed by taking the depolarization field effect into account.Within the framework of mean-field theory we investigate the behavior of the ferroelectric thin film. Our results show that the influence of the depolarization field is to flatten the spontaneous polarization profile and make the films more homogeneous, which is consistent with Ginzburg-Landau theory. This fact shows that this model can be taken as an effective model to deal with the ferroelectric film and can be further extended to refer to quantum effect. The competition between quantum effect and depolarization field induces some interesting phenomena on ferroelectric thin films.
作 者： TAO Yong-Mei SHI Qin-Fen JIANG Qing 作者单位： TAO Yong-Mei(Department of Physics, Changshu College, Changshu 215500, China;Department of Physics, Suzhou University, Suzhou 215006, China)SHI Qin-Fen,JIANG Qing(Department of Physics, Suzhou University, Suzhou 215006, China)
刊 名： 理论物理通讯（英文版） ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS 年，卷(期)： 2005 43(3) 分类号： 关键词： ferroelectric films depolarization field transverse Ising model