Different routes to charge disproportionation in perovskite-type Fe oxides

J. Matsuno*, T. Mizokawa, A. Fujimori, Y. Takeda, S. Kawasaki, M. Takano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)


Iron perovskites CaFeO3 and La0.33Sr0.67FeO3 show charge disproportionation, resulting in charge-ordered states with Fe3+:Fe5+ = 1: 1 and =2: 1, respectively. We have made photoemission and unrestricted Hartree-Fock band-structure calculations of CaFeO3 and compared it with La0.33Sr0.67FeO3. With decreasing temperature, a gradual decrease of the spectral weight near the Fermi level occurred in CaFeO3 as in La0.33Sr0.67FeO3 although lattice distortion occurs only in CaFeO3. Hartree-Fock calculations have indicated that both the breathing and tilting distortions are necessary to induce the charge disproportionation in CaFeO3, while no lattice distortion is necessary for the charge disproportionation in La0.33Sr0.67FeO3.

Original languageEnglish
Article number193103
Pages (from-to)1931031-1931034
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number19
Publication statusPublished - 2002 Nov 15
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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