Normal State Correlated Electronic Structure of Iron Pnictides

Abstract

We describe the correlated electronic structure of a prototype Fe-pnictide superconductor, $Sm{O}_{1-x}{F}_{x}FeAs$, using LDA+DMFT. Strong, multi-orbital electronic correlations generate a low-energy pseudogap in the undistorted phase, giving a bad, incoherent metal in qualitative agreement with observations. Very good semi-quantitative agreement with the experimental spectral functions is seen, and interpreted, within a correlated, multi-orbital picture. Our results show that Fe-pnictides should be understood as low-carrier density, incoherent metals, in resemblance to the underdoped cuprate superconductors.

4 pages, 3 figures

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Cited by in corpus (7)

• Electronic Structure of Fe-Based Superconductors
• Classification of the electronic correlation strength in the Fe-pnictides: The case of the parent compound BaFe2As2
• On the electronic structure of electron doped LaOFeAs as seen by X-ray absorption spectroscopy
• X-ray spectra and electronic structure of FeAs superconductors
• Strength of correlations in pnictides and its assessment by theoretical calculations and spectroscopy experiments
• Coulomb Parameter U and Correlation Strength in LaFeAsO
• Correlated electrons in Fe-As compounds: a quantum chemical perspective