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, Takashi Mizokawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number014505
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number1
DOIs
Publication statusPublished - 2015 Jan 13
Externally publishedYes

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Core levels
Ladders
Photoelectron spectroscopy
ladders
Chalcogens
photoelectric emission
Electrons
Photoemission
Ground state
spectroscopy
Charge transfer
electrons
charge transfer
insulators
Satellites
valence
ground state
room temperature
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Coexistence of localized and itinerant electrons in BaFe2X3 (X= S and Se) revealed by photoemission spectroscopy. / Ootsuki, D.; Saini, N. L.; Du, F.; Hirata, Y.; Ohgushi, K.; Ueda, Y.; Mizokawa, Takashi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 91, No. 1, 014505, 13.01.2015.

Research output: Contribution to journalArticle

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AU - Ohgushi, K.

AU - Ueda, Y.

AU - Mizokawa, Takashi

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