Abstract
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. © 2009 The American Physical Society.
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CITATION STYLE
Leisegang, T., Stöcker, H., Levin, A. A., Weißbach, T., Zschornak, M., Gutmann, E., … Meyer, D. C. (2009). Switching Ti valence in SrTiO3 by a dc electric field. Physical Review Letters, 102(8). https://doi.org/10.1103/PhysRevLett.102.087601
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