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

T. Higuchi; S. Nozawa; T. Tsukamoto; H. Ishii; R. Eguchi; Y. Tezukan; S. Yamaguchi; K. Kanai; S. Shin

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

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

Research output: Contribution to journal › Article › peer-review

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 t_2g and e_g 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 (E_F). 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 language	English
Article number	153105
Pages (from-to)	1531051-1531054
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	15
Publication status	Published - Oct 15 2002
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
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, R.; 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 journal › Article › peer-review

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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.",

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AU - Higuchi, T.

AU - Nozawa, S.

AU - Tsukamoto, T.

AU - Ishii, H.

AU - Eguchi, R.

AU - Tezukan, Y.

AU - Yamaguchi, S.

AU - Kanai, K.

AU - Shin, S.

PY - 2002/10/15

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N2 - 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.

AB - 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.

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

Abstract

ASJC Scopus subject areas

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