Paper Title:

Green's Function Approach to Crossover Properties for Interaction Parameters of an N-Layer Ferroelectric Thin Film

Periodical Advanced Materials Research (Volumes 152 - 153)
Main Theme New Materials and Advanced Materials
Edited by Zhengyi Jiang, Jingtao Han and Xianghua Liu
Pages 116-120
DOI 10.4028/www.scientific.net/AMR.152-153.116
Citation Zhao Xin Lu et al., 2010, Advanced Materials Research, 152-153, 116
Online since October, 2010
Authors Zhao Xin Lu, Bao Hua Teng, Xin Yang
Keywords Ferroelectric, Phase Diagram, Thin Film
Price US$ 28,-
Article Preview
View full size
Abstract

Utilizing the higher order decoupling approximation to the Fermi-type Green’s function, crossover properties of interaction parameters of an n-layer ferroelectric thin film from the ferroelectric-dominant phase diagram (FPD) to the paraelectric-dominant phase diagram (PPD) are investigated on the basis of the transverse Ising model. The curved surfaces for crossover values of interaction parameters of a thin film with certain layers are constructed in the three-dimensional parameter space. Because both the z-component (the polarization) and the transverse component of the spin are further included in the eigenfrequency, the results are in agreement with that of the effective-field theory with correlations to some extent. It shows that the higher order decoupling approximation diminishes the ferroelectric feature of a ferroelectric thin film compared with the usual mean-field approximation.