Linear plasmon dispersion in single-wall carbon nanotubes and the collective excitation spectrum of graphene - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2008

Linear plasmon dispersion in single-wall carbon nanotubes and the collective excitation spectrum of graphene

S. Maruyama
  • Fonction : Auteur
Valerio Olevano
  • Fonction : Auteur
  • PersonId : 930273

Résumé

We have measured a strictly linear pi-plasmon dispersion along the axis of individualized single wall carbon nanotubes, which is completely different from plasmon dispersions of graphite or bundled single wall carbon nanotubes. Comparative ab initio studies on graphene based systems allow us to reproduce the different dispersions. This suggests that individualized nanotubes provide viable experimental access to collective electronic excitations of graphene, and it validates the use of graphene to understand electronic excitations of carbon nanotubes. In particular, the calculations reveal that local field effects (LFE) cause a mixing of electronic transitions, including the 'Dirac cone', resulting in the observed linear dispersion.

Dates et versions

hal-00347264 , version 1 (15-12-2008)

Identifiants

Citer

C. Kramberger, R. Hambach, C. Giorgetti, M. H. Rummeli, M. Knupfer, et al.. Linear plasmon dispersion in single-wall carbon nanotubes and the collective excitation spectrum of graphene. Physical Review Letters, 2008, 100 (19), pp.196803. ⟨10.1103/PhysRevLett.100.196803⟩. ⟨hal-00347264⟩
233 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More