Site-specific valence-band X-ray photoelectron spectra of a SrTiO 3 single-crystal by X-ray standing wave technique

Tatsuo Fujii, Masahiro Kimura, Hideki Yoshikawa, Sei Fukushima

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 languageEnglish
Pages (from-to)375-379
Number of pages5
JournalSolid State Communications
Volume136
Issue number7
DOIs
Publication statusPublished - Nov 2005

Fingerprint

Photoelectrons
Valence bands
standing waves
photoelectrons
Single crystals
valence
X rays
single crystals
x rays
Ions
Synchrotrons
escape
Electronic structure
synchrotrons
ions
electronic structure
Crystals
excitation
crystals
strontium titanium oxide

Keywords

  • A. Ferroelectrics
  • D. Electronic states (localized)
  • E. Photoelectron spectroscopies

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Site-specific valence-band X-ray photoelectron spectra of a SrTiO 3 single-crystal by X-ray standing wave technique. / Fujii, Tatsuo; Kimura, Masahiro; Yoshikawa, Hideki; Fukushima, Sei.

In: Solid State Communications, Vol. 136, No. 7, 11.2005, p. 375-379.

Research output: Contribution to journalArticle

Fujii, Tatsuo ; Kimura, Masahiro ; Yoshikawa, Hideki ; Fukushima, Sei. / Site-specific valence-band X-ray photoelectron spectra of a SrTiO 3 single-crystal by X-ray standing wave technique. In: Solid State Communications. 2005 ; Vol. 136, No. 7. pp. 375-379.
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AB - 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.

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