Spin-integrated and spin-resolved photoemission study of Fe chalcogenides

K. Shimada, T. Mizokawa, K. Mamiya, T. Saitoh, A. Fujimori, K. Ono, A. Kakizaki, T. Ishii

研究成果: Article査読

47 被引用数 (Scopus)

抄録

The electronic structures of the antiferromagnetic semiconductor FeS and ferrimagnetic metals (Formula presented) and (Formula presented) have been studied by spin-integrated and spin-resolved photoemission spectroscopy and inverse-photoemission spectroscopy. The overall Fe (Formula presented) bandwidth in the photoemission spectra is 25-30 % narrower than the density of states (DOS) predicted by first-principles band-structure calculations and is accompanied by an intense tail on the high-binding-energy side, indicating the correlated nature of electrons in the Fe (Formula presented) band. Deviation from the band DOS is more significant in (Formula presented) than in (Formula presented), and in the minority-spin spectra than in the majority-spin spectra. Cluster-model calculation for FeS has shown satellite structures at high binding energies, but the calculated spectral line shape is not in good agreement with experiment compared to the band DOS. By introducing a self-energy correction to the band DOS, we could explain the narrowing of the overall Fe (Formula presented) bandwidth and the high-binding-energy tail shape but not for the unusual broadening of the Fe (Formula presented) band within (Formula presented) of the Fermi level.

本文言語English
ページ(範囲)8845-8853
ページ数9
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
57
15
DOI
出版ステータスPublished - 1998
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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