Influence of electronic correlations on orbital polarizations in the parent and doped iron pnictides

Abstract

Orbital polarization and electronic correlation are two essential aspects in understanding the normal state and superconducting properties of multiorbital FeAs-based superconductors. In this Letter, we present a systematical study on the orbital polarization of iron pnictides from weak to strong Coulomb correlations within the KRSB approach. The magnetic phase diagram of the two-orbital model for LaFeAsO clearly shows that the striped antiferromagnetic metallic phase with considerable orbital polarization exists over a wide doping range. The reversal of the orbital polarization occurs in the intermediate correlation regime.A small crystal field splitting enhances the orbital density wave order.

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Cited by in corpus (4)

• Hubbard-corrected DFT energy functionals: the LDA+U description of correlated systems
• Localization and Orbital Selectivity in Iron-Based Superconductors with Cu Substitution
• Band-filling and correlation controlling electronic properties and magnetism in K${}_x$Fe${}_{2-y}$Se${}_2$: A slave boson study
• The role of orbital order in the stabilization of the $(\pi ,0)$ ordered magnetic state in a minimal two-band model for iron pnictides