Photoemission and hartree-fock studies of oxygen-hole ordering in charge-disproportionated La1-xSrxFeO3

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

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Abstract

We have studied the “charge disproportionation” phenomenon in La1-xSrxFeO3 by photoemission spectroscopy and unrestricted Hartree-Fock band-structure calculations. We find a systematic decrease of the spectral intensity near Fermi level (EF) toward x=0.67, where the charge disproportion is most stabilized. The spectra for x=0.67 show the clearest temperature-dependent changes in the vicinity of EF across the transition corresponding to the charge ordering of “Fe3+”:“Fe5+”=2:1. The Hartree-Fock calculations indicate that ordering of oxygen holes indeed occurs in the charge disproportionated state.

Original languageEnglish
Pages (from-to)4605-4608
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number7
DOIs
Publication statusPublished - 1999 Jan 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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