Drude weight and dc conductivity of correlated electrons.

  title={Drude weight and dc conductivity of correlated electrons.},
  author={Uhrig and Vollhardt},
  journal={Physical review. B, Condensed matter},
  volume={52 8},
  • Uhrig, Vollhardt
  • Published 5 April 1995
  • Physics, Medicine
  • Physical review. B, Condensed matter
The Drude weight {ital D} and the dc conductivity {sigma}{sub dc}({ital T}) of strongly correlated electrons are investigated theoretically. Analytic results are derived for the homogeneous phase of the Hubbard model at {ital d}={infinity}, and for spinless fermions in this limit with 1/{ital d} corrections systematically included to lowest order. It is found that {sigma}{sub dc}({ital T}) is finite for all {ital T}{gt}0, displaying Fermi-liquid behavior, {sigma}{sub dc}{proportional_to}1/{ital… 
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