Orientation-dependent ferroelectricity of strained PbTiO3 films

被引：6

作者：

Zhang, Hui-Min ^{[1
]}

An, Ming ^{[1
]}

Yao, Xiao-Yan ^{[1
]}

Dong, Shuai ^{[1
]}

机构：

[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China

来源：

FRONTIERS OF PHYSICS | 2015年 / 10卷 / 06期

基金：

中国国家自然科学基金;

关键词：

PbTiO3; tetragonality; strain; AUGMENTED-WAVE METHOD; ARTIFICIAL SUPERLATTICES; OXIDE INTERFACES; PHASE-TRANSITION; POLARIZATION; FIELD;

D O I：

10.1007/s11467-015-0512-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

PbTiO3 is a simple but very important ferroelectric oxide that has been extensively studied and widely used in various technological applications. However, most previous studies and applications were based on the bulk material or the conventional [001]-orientated films. There are few studies on PbTiO3 films grown along other crystalline axes. In this study, a first-principles calculation was performed to compute the polarization of PbTiO3 films strained by SrTiO3 and LaAlO3 substrates. Our results show that the polarization of PbTiO3 films strongly depends on the growth orientation as well as the monoclinic angles. Further, it is suggested that the ferroelectricity of PbTiO3 mainly depends on the tetragonality of the lattice, instead of the simple strain.

引用

页数：5

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