Quasiparticle Energies and Band Gaps in Graphene Nanoribbons
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- 1 November 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 99 (18), 186801
- https://doi.org/10.1103/physrevlett.99.186801
Abstract
We 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 approximation. Because of the quasi-one-dimensional 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.
This publication has 33 references indexed in Scilit:
- Energy Band-Gap Engineering of Graphene NanoribbonsPhysical Review Letters, 2007
- Room-Temperature Quantum Hall Effect in GrapheneScience, 2007
- Energy Gaps in Graphene NanoribbonsPhysical Review Letters, 2006
- Truncation of periodic image interactions for confined systemsPhysical Review B, 2006
- Spin-Filtered Edge States and Quantum Hall Effect in GraphenePhysical Review Letters, 2006
- Peculiar width dependence of the electronic properties of carbon nanoribbonsPhysical Review B, 2006
- Quantum Spin Hall Effect in GraphenePhysical Review Letters, 2005
- Ultrathin Epitaxial Graphite: 2D Electron Gas Properties and a Route toward Graphene-based NanoelectronicsThe Journal of Physical Chemistry B, 2004
- Electronic transport properties of nanographite ribbon junctionsPhysical Review B, 2001
- Electron correlation in semiconductors and insulators: Band gaps and quasiparticle energiesPhysical Review B, 1986