Unoccupied electronic structure in the surface state of lightly doped SrTiO3 by resonant inverse photoemission spectroscopy

T. Higuchi, S. Nozawa, T. Tsukamoto, H. Ishii, Ritsuko Eguchi, Y. Tezukan, S. Yamaguchi, K. Kanai, S. Shin

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Abstract

The unoccupied electronic structure in the surface state of lightly doped SrTiO3 has been studied by resonant inverse-photoemission spectroscopy (RIPES). The RIPES spectra show two features whose energy separations match the t2g and eg subbands of unoccupied Ti 3d state. A peak clarified by the Ti 3p → 3d resonance effect is observed at -6.1 eV above Fermi level (EF). The -6.1 eV peak is not found in the O 1 s x-ray absorption spectrum, which reflects the electronic structure of the bulk state. The existence of the -6.1 eV peak suggests the correlation effect in the surface state of lightly doped SrTiO3.

Original languageEnglish
Article number153105
Pages (from-to)1531051-1531054
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number15
Publication statusPublished - Oct 15 2002
Externally publishedYes

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Surface states
Photoelectron spectroscopy
Electronic structure
photoelectric emission
electronic structure
Fermi level
spectroscopy
Absorption spectra
x ray spectra
x ray absorption
X rays
absorption spectra
strontium titanium oxide
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Unoccupied electronic structure in the surface state of lightly doped SrTiO3 by resonant inverse photoemission spectroscopy. / Higuchi, T.; Nozawa, S.; Tsukamoto, T.; Ishii, H.; Eguchi, Ritsuko; Tezukan, Y.; Yamaguchi, S.; Kanai, K.; Shin, S.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 66, No. 15, 153105, 15.10.2002, p. 1531051-1531054.

Research output: Contribution to journalArticle

Higuchi, T, Nozawa, S, Tsukamoto, T, Ishii, H, Eguchi, R, Tezukan, Y, Yamaguchi, S, Kanai, K & Shin, S 2002, 'Unoccupied electronic structure in the surface state of lightly doped SrTiO3 by resonant inverse photoemission spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 66, no. 15, 153105, pp. 1531051-1531054.
Higuchi, T. ; Nozawa, S. ; Tsukamoto, T. ; Ishii, H. ; Eguchi, Ritsuko ; Tezukan, Y. ; Yamaguchi, S. ; Kanai, K. ; Shin, S. / Unoccupied electronic structure in the surface state of lightly doped SrTiO3 by resonant inverse photoemission spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 66, No. 15. pp. 1531051-1531054.
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AU - Eguchi, Ritsuko

AU - Tezukan, Y.

AU - Yamaguchi, S.

AU - Kanai, K.

AU - Shin, S.

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