Abstract
Site-specific valence-band X-ray photoelectron spectra of SrTiO3 (111) were successfully obtained by using X-ray standing wave technique. Contributions of the Ti and SrO3 derived states to the valence-band spectra were clearly separated. The spectra provided not only site-specific but also bulk-sensitive information on the SrTiO3 crystal because of the use of a high-energy synchrotron X-ray source (hν=4750 eV) for photoelectron excitation with the large escape depth. The electronic structures calculated by the DV-Xα method using a (Sr8Ti27O 108)92- cluster model well reproduced the observed structures in the valence-band spectra. The partial density of states of both Ti and Sr ions in SrTiO3 were mainly distributed over the bottom of the valence-band to produce the covalent bonding with O ions.
Original language | English |
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Pages (from-to) | 375-379 |
Number of pages | 5 |
Journal | Solid State Communications |
Volume | 136 |
Issue number | 7 |
DOIs | |
Publication status | Published - Nov 1 2005 |
Keywords
- A. Ferroelectrics
- D. Electronic states (localized)
- E. Photoelectron spectroscopies
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Materials Chemistry