Effect of surface oxygen vacancies on electronic states of reduced SrTiO3(110) surface

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

研究成果: Article査読

5 被引用数 (Scopus)

抄録

The electronic structure of reduced SrTiO3(110) surface prepared by annealing in ultrahigh vacuum (UHV), has been studied using photoemission spectroscopy (PES) and scanning tunneling microscopy/spectroscopy (STM/STS). In the PES spectra of reduced SrTiO3(110) surface after annealing in UHV at 800°C, a clear metallic state with a sharp Fermi cut-off and a broad state centered at ∼1.1eV below the Fermi level are observed in the band gap region. A Ti3p->3d resonance enhancement is occurred for the metallic state, but not for the ∼1.1eV state. On the other hand, after the sample was annealed in UHV at 1000°C, it has been shown that the metallic state becomes drastically weak, and that only the ∼1.1eV state is seen in the band gap region. Thereafter, the ∼1.1eV state exhibits a clear Ti3p->3d resonance enhancement. The difference in the spectral feature of these band gap states is directly related to the surface geometric structural change.

本文言語English
ページ(範囲)1009-1010
ページ数2
ジャーナルPhysica C: Superconductivity and its applications
235-240
PART 2
DOI
出版ステータスPublished - 1994 12
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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