Theoretical evidence for strong correlations and incoherent metallic state in FeSe

Details Theoretical evidence for strong correlations and incoherent metallic state in FeSe Theoretical evidence for strong correlations and incoherent metallic state in FeSe

2010-03-05

arxiv.org/abs/1003.1286v2

Phys. Rev. B 82, 064504 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures, published version

Scientific paper

10.1103/PhysRevB.82.064504

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.

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