Fermi energy and dispersion anomalies in a bad metal

ORAL

Abstract

The transport measurements in strongly correlated metals often reveal a vanishing Fermi liquid temperature. It is unexpectedly smaller than the effective Fermi energy indicated by spectroscopic measurements. We attribute this dichotomy to the strong temperature dependence and asymmetry in quasiparticle renormalization near Fermi surface. The quasiparticles hold as well-defined excitations up to much higher energy than the Fermi liquid scale implied by transport. Furthermore, the asymmetry leads to incoherent spectral weight only for quasiparticles near Fermi surface, thus the discontinuity in dispersion rises as a natural consequence.

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Authors

  • Wenhu Xu

    Rutgers Univ

  • Kristjan Haule

    Rutgers The State University of New Jersey, Rutgers University, Department of Physics, Rutgers University, Piscataway, New Jersey 08854, USA, Rutgers Univ, Rutgers University, NJ, USA, Department of Physics and Astronomy, Rutgers University

  • G. Kotliar

    Rutgers University, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08856-8019, USA, Rutgers Univ, Department of Physics and Astronomy, Rutgers University, Dept. of Physics and Astronomy, Rutgers University