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ID 19339
本文ファイル
著者
Mizokawa, Takashi
Mamiya, Kazutoshi
Saitoh, Tomohiko
Fujimori, Atsushi
Ono, Kanta
Kakizaki, Akito
Ishii, Takehiko
Shirai, Masafumi
Kamimura, Takashi
抄録(英)
The electronic structures of the antiferromagnetic semiconductor FeS and ferrimagnetic metals Fe7S8 and Fe7Se8 have been studied by spin-integrated and spin-resolved photoemission spectroscopy and inverse-photoemission spectroscopy. The overall Fe 3d 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 3d band. Deviation from the band DOS is more significant in Fe7S8 than in Fe7Se8, 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 3d bandwidth and the high-binding-energy tail shape but not for the unusual broadening of the Fe 3d band within ∼ 1 eV of the Fermi level.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
57巻
15号
開始ページ
8845
終了ページ
8853
出版年月日
1998-04-15
出版者
American Physical Society
ISSN
0163-1829
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 1998 The American Physical Society.
関連情報URL
部局名
放射光科学研究センター