Validity of the Franck-Condon principle in the optical spectroscopy: Optical conductivity of the Frohlich polaron (Articolo in rivista)

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  • Validity of the Franck-Condon principle in the optical spectroscopy: Optical conductivity of the Frohlich polaron (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • De Filippis, G; Cataudella, V; Mishchenko, AS; Perroni, CA; Devreese, JT (2006)
    Validity of the Franck-Condon principle in the optical spectroscopy: Optical conductivity of the Frohlich polaron
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • De Filippis, G; Cataudella, V; Mishchenko, AS; Perroni, CA; Devreese, JT (literal)
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  • 96 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Naples Federico II, INFM, CNR, Coherentia, I-80126 Naples, Italy; Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy; AIST, JST, CREST, Tsukuba, Ibaraki 3058562, Japan; IV Kurchatov Atom Energy Inst, RRC, Moscow 123182, Russia; Res Ctr Julich, Inst Solid State Res, D-52425 Julich, Germany; Univ Instelling Antwerp, Dept Fys, TFVS, B-2610 Antwerp, Belgium (literal)
Titolo
  • Validity of the Franck-Condon principle in the optical spectroscopy: Optical conductivity of the Frohlich polaron (literal)
Abstract
  • The optical absorption of the Frohlich polaron model is obtained by an approximation-free diagrammatic Monte Carlo method and compared with two new approximate approaches that treat lattice relaxation effects in different ways. We show that: (i) a strong coupling expansion, based on the Franck-Condon principle, well describes the optical conductivity for large coupling strengths (alpha > 10); (ii) a memory function formalism with phonon broadened levels reproduces the optical response for weak coupling strengths (alpha < 6) taking the dynamic lattice relaxation into account. In the coupling regime 6
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