Switching Ti Valence in SrTiO3 by a dc Electric Field

被引：44

作者：

Leisegang, T. ^{[1
]}

Stoecker, H. ^{[1
]}

Levin, A. A. ^{[1
]}

Weissach, T. ^{[1
]}

Zschornak, M. ^{[1
]}

Gutmann, E. ^{[1
]}

Rickers, K. ^{[2
]}

Gemming, S. ^{[3
]}

Meyer, D. C. ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Strukturphys, D-01062 Dresden, Germany

[2] DESY, HASYLAB, D-22603 Hamburg, Germany

[3] Forschungszentrum Dresden Rossendorf, Inst Ionenstrahlphys & Mat Forsch, D-01314 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 08期

关键词：

X-RAY-ABSORPTION; BAND;

D O I：

10.1103/PhysRevLett.102.087601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A (001) SrTiO3 wafer has been investigated in situ at room temperature under application of a static electric field of varying polarity by fluorescence x-ray absorption near edge structure (XANES) analysis at the Sr-K and Ti-K absorption edges. The XANES spectra show a clear shift of the Ti-K absorption edge energy. The shift is attributed to a change of the Ti valence state in a volume invoked by diffusion of the oxygen ions and vacancies. No shift was observed for the Sr-K absorption edge energy. Theoretical calculations support these findings.

引用

页数：4

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