Valence-band and core-level photoemission spectroscopy of LaFeAsO1-xFx
Abstract
We have investigated the electronic structure of LaFeAsO1-xFx (x=0;0.1;0.2) by angle-integrated photoemission spectroscopy and local-density approximation (LDA)-based band-structure calculations. The valence band consists of a low-energy peak at E≈-0.25eV and a broad structure around E≈-5eV , which are in qualitative agreement with LDA. From the photon-energy dependence of these peaks we conclude that the former derives almost exclusively from Fe3d states. This constitutes experimental evidence for the strong iron character of the relevant states in a broad window around EF and confirms theoretical predictions.
- Publication:
-
Physical Review B
- Pub Date:
- November 2008
- DOI:
- 10.1103/PhysRevB.78.180506
- arXiv:
- arXiv:0806.0833
- Bibcode:
- 2008PhRvB..78r0506K
- Keywords:
-
- 74.70.Dd;
- 71.20.Be;
- Ternary quaternary and multinary compounds;
- Transition metals and alloys;
- Condensed Matter - Superconductivity
- E-Print:
- 12 pages, 3 figures