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

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number115314
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number11
DOIs
Publication statusPublished - 2013 Mar 25
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Electronic structure of the hydrogen-adsorbed SrTiO<sub>3</sub>(001) surface studied by polarization-dependent photoemission spectroscopy'. Together they form a unique fingerprint.

  • Cite this