Atomic-scale analysis of the oxygen configuration at a SrTiO3 dislocation core -: art. no. 225506

被引：110

作者：

Jia, CL ^{[1
]}

Thust, A

Urban, K

机构：

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

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.95.225506

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The atomic structure of a SrTiO3 dislocation is revealed directly by phase-retrieval electron microscopy. In particular, atomic columns of light oxygen are observed simultaneously with the columns of considerably heavier Sr and Ti. A distinct structural modification of the oxygen octahedra at the dislocation core as well as a significant nonstoichiometry, including a deficiency of oxygen, are observed. Deviations from the bulk chemical concentration are quantified column by column by means of structure modeling and quantum-mechanical simulations of the electron scattering process.

引用

页数：4

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