Quasiparticle Energies and Band Gaps of Graphene Nanoribbons

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dc.creatorYang, Li
dc.creatorPark, Cheol-Hwan
dc.creatorSon, Young-Woo
dc.creatorCohen, Marvin L.
dc.creatorLouie, Steven G.
dc.date2007-06-11
dc.date.accessioned2026-07-07T08:41:42Z
dc.date.available2026-07-07T08:41:42Z
dc.descriptionWe present calculations of the quasiparticle energies and band gaps of graphene nanoribbons (GNRs) carried out using a first-principles many-electron Green's function approach within the GW approximation. Because of the quasi-one-dimension nature of a GNR, electron-electron interaction effects due to the enhanced screened Coulomb interaction and confinement geometry greatly influence the quasiparticle band gap. Compared with previous tight-binding and density functional theory studies, our calculated quasiparticle band gaps show significant self-energy corrections for both armchair and zigzag GNRs, in the range of 0.5-3.0 eV for ribbons of width 2.4-0.4 nm. The quasiparticle band gaps found here suggest that use of GNRs for electronic device components in ambient conditions may be viable.
dc.description5 pages and 4 figures
dc.identifierhttps://arxiv.org/abs/0706.1589
dc.identifierhttp://arxiv.org/abs/0706.1589
dc.identifierPhys. Rev. Lett. 99, 186801 (2007)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/141756
dc.subjectMesoscale and Nanoscale Physics
dc.titleQuasiparticle Energies and Band Gaps of Graphene Nanoribbons
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