Theoretical evidence for strong correlations and incoherent metallic state in FeSe
arXiv:1003.1286 · doi:10.1103/PhysRevB.82.064504
Abstract
The role of electronic Coulomb correlations in iron-based superconductors is an important open question. We provide theoretical evidence for strong correlation effects in the FeSe compound, based on dynamical mean field calculations. A lower Hubbard band is found in the spectral properties. Moreover, together with significant orbital-dependent mass enhancements, we find that the normal state is a bad metal over an extended temperature range, implying a non-Fermi liquid. Predictions for angle-resolved photoemission spectroscopy are made.
5 pages, 5 figures, published version