Electronic structure of Ce1-xSrxTiO3: Comparison between substitutional and vacancy doping

Takayoshi Yokoya, T. Sato, H. Fujisawa, T. Takahashi, A. Chainani, M. Onoda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The change of the electronic structure across the metal-insulator transition in a Mott-Hubbard system Ce1-xSrxTiO3 has been investigated by x-ray absorption and photoemission spectroscopy. The results are compared with CeTiO3+δ, where hole doping is achieved by excess oxygen instead of Sr substitution. It is found that additional doped-hole states are created in the insulator gap for both cases, while the density of states at the Fermi level in CeTiO3+δ, is nearly half of that in Ce1-xSrxTiO3 at the same nominal doping. This suggests a strong reduction in the mobility of carriers due to cation vacancies produced by excess oxygen.

Original languageEnglish
Pages (from-to)1815-1818
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume59
Issue number3
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

Vacancies
Electronic structure
Doping (additives)
insulators
Oxygen
electronic structure
Metal insulator transition
oxygen
Photoelectron spectroscopy
Fermi level
Absorption spectroscopy
x ray absorption
x ray spectroscopy
Cations
absorption spectroscopy
Substitution reactions
photoelectric emission
Positive ions
substitutes
cations

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Electronic structure of Ce1-xSrxTiO3 : Comparison between substitutional and vacancy doping. / Yokoya, Takayoshi; Sato, T.; Fujisawa, H.; Takahashi, T.; Chainani, A.; Onoda, M.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 59, No. 3, 1999, p. 1815-1818.

Research output: Contribution to journalArticle

Yokoya, Takayoshi ; Sato, T. ; Fujisawa, H. ; Takahashi, T. ; Chainani, A. ; Onoda, M. / Electronic structure of Ce1-xSrxTiO3 : Comparison between substitutional and vacancy doping. In: Physical Review B - Condensed Matter and Materials Physics. 1999 ; Vol. 59, No. 3. pp. 1815-1818.
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