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Coexistence of localized and itinerant electrons in BaFe2X3 (X = S and Se) revealed by photoemission spectroscopy
- Source :
- Phys. Rev. B 91, 014505 (2015)
- Publication Year :
- 2015
-
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.<br />Comment: 5 pages, 5 figures, Accepted in publication for Physical Review B
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 91, 014505 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1501.02075
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.91.014505