Valence band and core level photoemission spectros-copy of LaFeAsO${}_{1-x}$F${}_x$

Abstract

We have investigated the electronic structure of LaFeAsO${}_{1-x}$F${}_x$ (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 = -0.25 eV and a broad structure around E = -5 eV in qualitative agreement with LDA. From the photon energy dependence of these peaks we conclude that the former derives almost exclusively from Fe 3d states. This constitutes experimental evidence for the strong iron character of the relevant states in a broad window around EF and confirms theoretical predictions.

arXiv comment12 pages, 3 figures

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• Hall effect and magnetoresistance in the normal state of the superconductor LaO${}_{0.9}$F${}_{0.1-x}$FeAs
• Upper critical field, Hall effect and magnetoresistance in the iron-based layered superconductor LaFeAsO_{0.9}F_{0.1-δ}
• A possible ground state and its electronic structure of a mother material (LaOFeAs) of new superconductors
• Point-Contact Spectroscopy of Iron-Based Layered Superconductor LaO${}_{0.9}$F${}_{0.1-\delta }$FeAs

Cited by in corpus (12)

• Electronic Structure of Fe-Based Superconductors
• Crossover from weak to strong pairing in unconventional superconductors
• Spin fluctuations in iron pnictides and chalcogenides: From antiferromagnetism to superconductivity
• Three-dimensional electronic structure of superconducting iron pnictides observed by angle-resolved photoemission spectroscopy
• A high resolution, hard X-ray photoemission investigation of BaFe${}_2$As${}_2$: moderate influence of the surface and evidence for a low degree of Fe 3d - As 4p hybridization of the near-E${}_F$ electronic states
• Strength of correlations in pnictides and its assessment by theoretical calculations and spectroscopy experiments
• Electronic structure of CaFe2As2: Contribution of itinerant Fe 3d-states to the Fermi Level
• Electronic Structure of CeFeAsO1-xFx (x=0, 0.11/x=0.12) compounds
• Angle-resolved photoemission spectroscopy study of PrFeAsO_{0.7}: Dependence of the electronic structure on the pnictogen height
• Pseudogap-like phase in Ca(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ revealed by ${}^{75}$As NQR
• Electronic phase diagram of NdFe1-xRhxAsO
• Electronic structure of the Mo${}_{1-x}$Re${}_x$ alloys studied through resonant photoemission spectroscopy