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Theoretical evidence for strong correlations and incoherent metallic state in FeSe

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arxiv 1003.1286 v2 pith:FUBQYZVR submitted 2010-03-05 cond-mat.str-el cond-mat.supr-con

Theoretical evidence for strong correlations and incoherent metallic state in FeSe

Markus Aichhorn , Silke Biermann , Takashi Miyake , Antoine Georges , Masatoshi Imada This is my paper
classification cond-mat.str-el cond-mat.supr-con
keywords correlationsevidencefesestatestrongtheoreticalangle-resolvedband
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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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