Correlated Electronic Structure ofLaO1−xFxFeAs

We compute the electronic structure, momentum resolved spectral function and optical conductivity of the new superconductor ${\mathrm{LaO}}_{1-x}{\mathrm{F}}_x\mathrm{FeAs}$ within the combination of the density functional theory and dynamical mean field theory. We find that the compound in the normal state is a strongly correlated metal and the parent compound is a bad metal at the verge of the metal insulator transition. We argue that the superconductivity is not phonon mediated.