Normal State Correlated Electronic Structure of Iron Pnictides

Details Normal State Correlated Electronic Structure of Iron Pnictides Normal State Correlated Electronic Structure of Iron Pnictides

2008-05-23

arxiv.org/abs/0805.3636v1

extended version published in Phys. Rev. B 78, 134511 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.78.134511

We describe the correlated electronic structure of a prototype Fe-pnictide superconductor, $SmO_{1-x}F_{x}FeAs$, 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.

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