On the Electronic Structure of Electron Doped LaFeAsO1-xFx
Publication date
2008-11
Authors
Kroll, T.
Bonhommeau, S.
Kachel, T.
Duerr, H. A.
Werner, J.
Behr, G.
Koitzsch, A.
Ariffin, A. K.
Manzke, R.
De Groot, F.
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Advisors
Supervisors
Document Type
Article
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Abstract
We investigated the recently found superconductor LaFeAsO1-xFx by X-ray absorption spectroscopy (XAS). A shift in the chemical potential is visible in both the Fe L-2,L-3 and O K edge spectra which emphasizes the importance of band effects and moderate correlations in these compounds. From experimental Fe L-2,L-3 edge spectra and charge transfer multiplet calculations we gain further information on important physical values such as hopping parameters, the charge transfer energy Delta, and the on-site Hubbard U. Furthermore we find the system to be very covalent with a large amount of ligand holes.
Keywords
Oxypnictides, Spectroscopy, Electronic Structure, Taverne
Citation
Kroll, T, Bonhommeau, S, Kachel, T, Duerr, H A, Werner, J, Behr, G, Koitzsch, A, Ariffin, A K, Manzke, R, de Groot, F M F, Fink, J, Eschrig, H, Buechner, B & Knupfer, M 2008, 'On the Electronic Structure of Electron Doped LaFeAsO1-xFx', Journal of the Physical Society of Japan, vol. 77, pp. 117-118. https://doi.org/10.1143/JPSJS.77SC.117