Excitons in carbon nanotubes: an ab initio symmetry-based approach (Articolo in rivista)

Type
Label
  • Excitons in carbon nanotubes: an ab initio symmetry-based approach (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.92.196401 (literal)
Alternative label
  • Chang E., Bussi G.; Ruini A., and Molinari E. (2004)
    Excitons in carbon nanotubes: an ab initio symmetry-based approach
    in Physical review letters (Print); American Physical Society (APS), College Pk (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Chang E., Bussi G.; Ruini A., and Molinari E. (literal)
Pagina inizio
  • 196401 (literal)
Pagina fine
  • 196401 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://link.aps.org/doi/10.1103/PhysRevLett.92.196401 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 92 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • INFM National Center on NanoStructures and BioSystems at Surfaces (S3) and Dipartimento di Fisica, Università di Modena e Reggio Emilia, Via Campi 213/A, 41100 Modena, Italy (literal)
Titolo
  • Excitons in carbon nanotubes: an ab initio symmetry-based approach (literal)
Abstract
  • The optical absorption spectrum of the carbon (4,2) nanotube is computed using an ab initio many-body approach which takes into account excitonic effects. We develop a new method involving a local basis set which is symmetric with respect to the screw-symmetry of the tube. Such a method has the advantages of scaling faster than plane-wave methods and allowing for a precise determination of the symmetry character of the single-particle states, two-particle excitations, and selection rules. The binding energy of the lowest, optically active states is approximately 0.8 eV. The corresponding exciton wave functions are delocalized along the circumference of the tube and localized in the direction of the tube axis. (literal)
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