Alternative representation of the Kubo formula for the optical conductivity: A shortcut to transport properties (Articolo in rivista)

Type
Label
  • Alternative representation of the Kubo formula for the optical conductivity: A shortcut to transport properties (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.90.014310 (literal)
Alternative label
  • De Filippis, G.; Cataudella, Vittorio; De Candia, Antonio; Mishchenko, Andrei S.; Nagaosa, Naoto (2014)
    Alternative representation of the Kubo formula for the optical conductivity: A shortcut to transport properties
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • De Filippis, G.; Cataudella, Vittorio; De Candia, Antonio; Mishchenko, Andrei S.; Nagaosa, Naoto (literal)
Pagina inizio
  • 014310 (literal)
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  • http://www.scopus.com/record/display.url?eid=2-s2.0-84905395962&origin=inward (literal)
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  • 90 (literal)
Rivista
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  • 1 (literal)
Note
  • Scopu (literal)
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  • Universita degli Studi di Napoli Federico II; Riken; University of Tokyo (literal)
Titolo
  • Alternative representation of the Kubo formula for the optical conductivity: A shortcut to transport properties (literal)
Abstract
  • The Kubo formula for the electrical conductivity is expressed in terms of a weighted sum of Drude-like contributions associated to the exact eigenstates of the interacting system, each characterized by its own frequency-dependent relaxation time. This alternative formulation considerably simplifies the access to the static properties (dc conductivity) and resolves the long-standing difficulty to connect the Boltzmann transport theory and the Kubo formula. In particular, at the lowest order of the perturbation theory, the correct transport scattering lifetime depending on the momentum k, which appears in the Boltzmann theory, instead of the single-electron lifetime appearing in the Green function, can be recovered. This alternative formulation is applied to (i) the elastic scattering in metals, and (ii) the inelastic scattering in the Fröhlich polaron model to obtain the exact result of the mobility in the low-temperature weak-coupling limit. © 2014 American Physical Society. (literal)
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