Interface Control of Emergent Ferroic Order in Ruddlesden-Popper Srn+1TinO3n+1

被引：78

作者：

Birol, Turan ^{[1
]}

Benedek, Nicole A. ^{[1
]}

Fennie, Craig J. ^{[1
]}

机构：

[1] Cornell Univ, Sch Appl Engn Phys, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 25期

基金：

美国国家科学基金会;

关键词：

FERROELECTRICITY; SRTIO3; FILMS;

D O I：

10.1103/PhysRevLett.107.257602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discovered from first principles an unusual polar state in the low n Srn+1TinO3n+1 Ruddlesden-Popper (RP) layered perovskites in which ferroelectricity is nearly degenerate with antiferroelectricity, a relatively rare form of ferroic order. We show that epitaxial strain plays a key role in tuning the "perpendicular coherence length" of the ferroelectric mode, and does not induce ferroelectricity in these low-dimensional RP materials as is well known to occur in SrTiO3. These systems present an opportunity to manipulate the coherence length of a ferroic distortion in a controlled way, without disorder or a free surface.

引用

页数：5

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