On the Electronic Structure of Electron Doped LaFeAsO1-xFx

T. Kroll; S. Bonhommeau; T. Kachel; H. A. Duerr; J. Werner; G. Behr; A. Koitzsch; A. K. Ariffin; R. Manzke; F. M. F. de Groot; J. Fink; H. Eschrig; B. Buechner; M. Knupfer

doi:10.1143/JPSJS.77SC.117

On the Electronic Structure of Electron Doped LaFeAsO1-xFx

T. Kroll^*
, S. Bonhommeau
, T. Kachel
, H. A. Duerr
, J. Werner
, G. Behr
, A. Koitzsch
, A. K. Ariffin
, R. Manzke
, F. M. F. de Groot
, J. Fink
, H. Eschrig
, B. Buechner
, M. Knupfer

^*Corresponding author for this work

IFW Dresden
German Cancer Research Center
Institute Phys
Utrecht University

Research output: Contribution to journal › Article › Academic › peer-review

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.

Original language	English
Pages (from-to)	117-118
Number of pages	2
Journal	Journal of the Physical Society of Japan
Volume	77
DOIs	https://doi.org/10.1143/JPSJS.77SC.117
Publication status	Published - Nov 2008

Funding

This investigation was supported by the DFG (SFB 463 and KR 3611/1-1) and DFG priority program SPP1133.

Keywords

Oxypnictides
Spectroscopy
Electronic Structure

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title = "On the Electronic Structure of Electron Doped LaFeAsO1-xFx",

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",

author = "T. Kroll and S. Bonhommeau and T. Kachel and Duerr, \{H. A.\} and J. Werner and G. Behr and A. Koitzsch and Ariffin, \{A. K.\} and R. Manzke and \{de Groot\}, \{F. M. F.\} and J. Fink and H. Eschrig and B. Buechner and M. Knupfer",

year = "2008",

month = nov,

doi = "10.1143/JPSJS.77SC.117",

language = "English",

volume = "77",

pages = "117--118",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "The Physical Society of Japan",

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TY - JOUR

T1 - On the Electronic Structure of Electron Doped LaFeAsO1-xFx

AU - Kroll, T.

AU - Bonhommeau, S.

AU - Kachel, T.

AU - Duerr, H. A.

AU - Werner, J.

AU - Behr, G.

AU - Koitzsch, A.

AU - Ariffin, A. K.

AU - Manzke, R.

AU - de Groot, F. M. F.

AU - Fink, J.

AU - Eschrig, H.

AU - Buechner, B.

AU - Knupfer, M.

PY - 2008/11

Y1 - 2008/11

N2 - 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.

AB - 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.

KW - Oxypnictides

KW - Spectroscopy

KW - Electronic Structure

U2 - 10.1143/JPSJS.77SC.117

DO - 10.1143/JPSJS.77SC.117

M3 - Article

SN - 0031-9015

VL - 77

SP - 117

EP - 118

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

ER -

On the Electronic Structure of Electron Doped LaFeAsO1-xFx

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