Coexistence of localized and itinerant electrons in BaFe2X3 (X= S and Se) revealed by photoemission spectroscopy

D. Ootsuki, N. L. Saini, F. Du, Y. Hirata, K. Ohgushi, Y. Ueda, T. Mizokawa

研究成果: Article査読

20 被引用数 (Scopus)

抄録

We report a photoemission study at room temperature on BaFe2X3 (X=S and Se) and CsFe2Se3 in which two-leg ladders are formed by the Fe sites. The Fe 2p core-level peaks of BaFe2X3 are broad and exhibit two components, indicating that itinerant and localized Fe 3d sites coexist similar to KxFe2-ySe2. The Fe 2p core-level peak of CsFe2Se3 is rather sharp and is accompanied by a charge-transfer satellite. The insulating ground state of CsFe2Se3 can be viewed as a Fe2+ Mott insulator in spite of the formal valence of +2.5. The itinerant versus localized behaviors can be associated with the stability of chalcogen p holes in the two-leg ladder structure.

本文言語English
論文番号014505
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
91
1
DOI
出版ステータスPublished - 2015 1 13
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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