Oxygen octahedron reconstruction in the SrTiO3/LaAlO3 heterointerfaces investigated using aberration-corrected ultrahigh-resolution transmission electron microscopy

被引：181

作者：

Jia, C. L. ^{[1
,2
]}

Mi, S. B. ^{[1
,2
]}

Faley, M. ^{[1
,2
]}

Poppe, U. ^{[1
,2
]}

Schubert, J. ^{[3
,4
]}

Urban, K. ^{[1
,2
]}

机构：

[1] Forschungszentrum, Inst Solid State Res, D-52425 Julich, Germany

[2] Forschungszentrum, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany

[3] Forschungszentrum, Inst Bio & Nanosyst, D-52425 Julich, Germany

[4] Forschungszentrum, Ctr Nanoelect Syst Informat Technol, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 08期

关键词：

interface structure; lanthanum compounds; lattice constants; multilayers; strontium compounds; transmission electron microscopy; ROOM-TEMPERATURE; ATOMIC-SCALE; THIN-FILMS; INTERFACES; OXIDES;

D O I：

10.1103/PhysRevB.79.081405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the LaAlO3/SrTiO3 interface by means of aberration-corrected ultrahigh-resolution transmission electron microscopy allowing us to measure the individual atomic shifts in the interface at a precision of a few picometers. We find that the oxygen octahedron rotation typical for rhombohedral LaAlO3 is across the interface and is also induced in the originally cubic SrTiO3 layer. Octahedra distortion leads to ferroelectricitylike dipole formation in the interface which is in addition modified by cation intermixing.

引用

页数：4

共 27 条

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