Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film

doi:10.1088/1674-1056/19/12/127701

中国物理B ›› 2010, Vol. 19 ›› Issue (12): 127701-127701.doi: 10.1088/1674-1056/19/12/127701

Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film

张怀武¹, 卢兆信², 滕保华², 杨新², 戎永辉²

(1)School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China; (2)School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

收稿日期:2010-06-08 修回日期:2010-07-16 出版日期:2010-12-15 发布日期:2010-12-15
基金资助:
Project supported partly by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 60721001).

Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film

Lu Zhao-Xin(卢兆信)^a), Teng Bao-Hua(滕保华)^a)^†, Yang Xin(杨新)^a), Rong Yong-Hui(戎永辉)^a), and Zhang Huai-Wu(张怀武)^b)

^a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China; ^b School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

Received:2010-06-08 Revised:2010-07-16 Online:2010-12-15 Published:2010-12-15
Supported by:
Project supported partly by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 60721001).

摘要/Abstract

摘要： By modifying the interchange interactions and the transverse fields on the epitaxy surface layer, this paper studies the phase transition properties of an n-layer ferroelectric thin film by the Fermi-type Green's function technique based on the transverse Ising model with a four-spin interaction. The special attention is given to the effect of the epitaxy surface layer on the first-order phase transition properties in the parameter space constructed by the ratios of the bulk transverse field and the bulk four-spin interaction to the bulk two-spin interaction with the framework of the higher-order decoupling approximation to the Fermi-type Green's function. The results show that the first-order phase transition properties will be changed significantly due to the modification of interchange interaction and transverse field parameters on the epitaxy surface layer. The dependence of the first-order phase transition properties on the thickness of ferroelectric thin films is also discussed.

Abstract: By modifying the interchange interactions and the transverse fields on the epitaxy surface layer, this paper studies the phase transition properties of an n-layer ferroelectric thin film by the Fermi-type Green's function technique based on the transverse Ising model with a four-spin interaction. The special attention is given to the effect of the epitaxy surface layer on the first-order phase transition properties in the parameter space constructed by the ratios of the bulk transverse field and the bulk four-spin interaction to the bulk two-spin interaction with the framework of the higher-order decoupling approximation to the Fermi-type Green's function. The results show that the first-order phase transition properties will be changed significantly due to the modification of interchange interaction and transverse field parameters on the epitaxy surface layer. The dependence of the first-order phase transition properties on the thickness of ferroelectric thin films is also discussed.

Key words: ferroelectric thin film, phase diagram

中图分类号: (Classical spin models)

75.10.Hk

卢兆信, 滕保华, 杨新, 戎永辉, 张怀武. Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film[J]. 中国物理B, 2010, 19(12): 127701-127701.

Lu Zhao-Xin(卢兆信), Teng Bao-Hua(滕保华), Yang Xin(杨新), Rong Yong-Hui(戎永辉), and Zhang Huai-Wu(张怀武). Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film[J]. Chin. Phys. B, 2010, 19(12): 127701-127701.

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Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film

Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film

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