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

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