Orbital differentiation and the role of orbital ordering in the magnetic state of Fe superconductors

Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC, Cantoblanco, E-28049 Madrid (Spain).(Dated: November 13, 2012)We analyze the metallic (π,0) antiferromagnetic state of a five-orbital model for iron supercon-ductors. We find that with increasing interactions the system does not evolve trivially from the pureitinerant to the pure localized regime. Instead we find a region with a strong orbital differentiationbetween xy and yz, which are half-filled gapped states at the Fermi level, and itinerant zx, 3z