Electrostatic Coupling and Local Structural Distortions at Interfaces in Ferroelectric/Paraelectric Superlattices

被引：104

作者：

Zubko, P. ^{[1
]}

Jecklin, N. ^{[1
]}

Torres-Pardo, A. ^{[1
,2
]}

Aguado-Puente, P. ^{[3
]}

Gloter, A. ^{[2
]}

Lichtensteiger, C. ^{[1
]}

Junquera, J. ^{[3
]}

Stephan, O. ^{[2
]}

Triscone, J. -M. ^{[1
]}

机构：

[1] Univ Geneva, DPMC, CH-1211 Geneva 4, Switzerland

[2] Univ Paris 11, CNRS UMR 8502, Phys Solides Lab, F-91405 Orsay, France

[3] Univ Cantabria, Dept Ciencias Tierra & Fis Mat Condensada, E-39005 Santander, Spain

来源：

NANO LETTERS | 2012年 / 12卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

Ferroelectric domains; oxide superlattices; electrostatic coupling; electron energy loss spectroscopy; FERROELECTRICITY; POLARIZATION; ENHANCEMENT; DOMAINS; SCALE; FILMS;

D O I：

10.1021/nl3003717

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The performance of ferroelectric devices is intimately entwined with the structure and dynamics of ferroelectric domains. In ultrathin ferroelectrics, ordered nanodomains arise naturally in response to the presence of a depolarizing field and give rise to highly inhomogeneous polarization and structural profiles. Ferroelectric superlattices offer a unique way of engineering the desired nanodomain structure by modifying the strength of the electrostatic interactions between different ferroelectric layers. Through a combination of X-ray diffraction, transmission electron microscopy, and first-principles calculations, the electrostatic coupling between ferroelectric layers is studied, revealing the existence of interfacial layers of reduced tetragonality attributed to inhomogeneous strain and polarization profiles associated with the domain structure.

引用

页码：2846 / 2851

页数：6

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