A self-consistent approach to soft mode analysis in size driven ferroelectricity

被引：2

作者：

Khare, Preeti ^{[1
]}

Sa, Debanand ^{[1
]}

机构：

[1] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

来源：

PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 15-16期

关键词：

Ferroelectric; Nanostructures; Phase transition; PBTIO3 ULTRAFINE PARTICLES; PHASE-TRANSITION; DEPOLARIZATION-FIELD; LANDAU THEORY; FILMS; NANOPARTICLES; NANOCRYSTALS; MEMORIES; TITANATE;

D O I：

10.1016/j.physb.2011.04.011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The polarization distribution in a finite size system obtained through Landau phenomenology is shown to contain unphysical oscillatory parts [P. Khare, D. Sa, Solid State Commun. 150 (2010) 172]. Self-consistency in the solution has been used to remove such difficulty and the issue of soft mode in such system has been addressed. The temperature as well as the size dependence of the soft mode frequency is calculated and compared with the experiment. The extrapolation length for the size driven ferroelectricity is argued to behave in a way similar to that of correlation length in phase transition in bulk system. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2948 / 2952

页数：5

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