From Si nanowires to porous silicon: The role of excitonic effects (Articolo in rivista)

Type
Label
  • From Si nanowires to porous silicon: The role of excitonic effects (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Bruno, M; Palummo, M; Marini, A; Del Sole, R; Ossicini, S (2007)
    From Si nanowires to porous silicon: The role of excitonic effects
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Bruno, M; Palummo, M; Marini, A; Del Sole, R; Ossicini, S (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 98 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Roma Tor Vergata, CNR, INFM, ETSF,Inst Stat Mech & Complex,CNISM, I-00133 Rome, Italy; Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy; Univ Modena & Reggio Emilia, CNR, INFMS, I-42100 Reggio Emilia, Italy; Univ Modena & Reggio Emilia, Dipartimento Sci & Metodi Ingn, I-42100 Reggio Emilia, Italy (literal)
Titolo
  • From Si nanowires to porous silicon: The role of excitonic effects (literal)
Abstract
  • We show that the electronic and optical properties of silicon nanowires, with different size and orientation, are dominated by important many-body effects. The electronic and excitonic gaps, calculated within first principles, agree with the available experimental data. Huge excitonic effects, which depend strongly on wire orientation and size, characterize the optical spectra. Modeling porous silicon as a collection of interacting nanowires, we find an absorption spectrum which is in very good agreement with experimental measurements only when the electron-hole interaction is included. (literal)
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