Effects of surface oxygen vacancies on electronic states of TiO2(110), TiO2(001) and SrTiO3(001) surfaces

Y. Aiura, Y. Nishihara, Y. Haruyama, T. Komeda, S. Kodaira, Y. Sakisaka, T. Maruyama, H. Kato

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37 Citations (Scopus)

Abstract

We have studied effects of surface oxygen vacancies on electronic states of TiO2(110), TiO2(001) and SrTiO3(001) surfaces by means of angle-resolved photoemission spectroscopy. The surface oxygen vacancy induces a state at ∼1 eV below the Fermi level in the bulk band gap. In the angle-resolved photoemission spectra, this state has slight energy dispersion and doesn't cross the Fermi level when the emission angle is changed. These results indicate that the state induced by surface oxygen vacancies is not simply interpreted by delocalized model, and that the localized behavior also plays an important role for the metal-insulator transition of these materials.

Original languageEnglish
Pages (from-to)1215-1216
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Volume194-196
Issue numberPART 1
DOIs
Publication statusPublished - 1994 Feb 2
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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