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 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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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, 66(15), 1531051-1531054. [153105].