Electronic structure of the hydrogen-adsorbed SrTiO3(001) surface studied by polarization-dependent photoemission spectroscopy

R. Yukawa, S. Yamamoto, K. Ozawa, M. D'Angelo, M. Ogawa, M. G. Silly, F. Sirotti, I. Matsuda

研究成果: Article査読

19 被引用数 (Scopus)

抄録

The metallic band structure of the hydrogen-adsorbed SrTiO3(001) surface is studied by polarization-dependent photoemission spectroscopy measurements. With the dipole-transition selection arguments, we attributed the metallic peaks into the Ti 3dxz, 3dyz, and 3dxy bands. These t2g bands are partially filled with electrons upon H-induced downward band bending at the surface. Energy splitting of the Ti 3d t2g bands is considered to be induced by a quantum confinement along the surface normal (z) direction. The metallic peaks are accompanied by the incoherent states induced by many-body interactions, which likely indicates that the electronic system forms a two-dimensional liquid phase. Also emerged by H exposure are an in-gap state and a σ(O-H) state. The possible origin and the feature of these states are discussed from the polarization dependence of the photoemission intensity.

本文言語English
論文番号115314
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
87
11
DOI
出版ステータスPublished - 2013 3 25
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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