Hallmarks of nematicity in the spectral weight redistribution of Hund's metals

The theoretical understanding of the nematic state of iron-based superconductors and especially of FeSe is still a puzzling problem. Although a number of experiments call for a prominent role of local correlations and identify iron superconductors as Hund's metals, the effect of the electronic correlations in the nematic state has been theoretically poorly investigated. Recent Fermi-liquid analysis predict that the lifted orbital degeneracy of the nematic state leads to different quasiparticle coherence factor for the yz/xz orbitals at the Fermi energy, however these techniques cannot provide any information about the orbital-dependent spectral weight redistribution at low-energy. In this work we use Dynamical Mean Field Theory to study the nematic phase of a multiorbital system characterized by strong electronic correlations. We distinguish the specific features characterizing the Hund's metal with respect to a standard correlated metal and connect our results with recent ARPES experiments on iron-based superconductors.