Suppression of the orientation effects on bandgap in graphene nanoribbons in the presence of edge disorder
- 28 January 2008
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 92 (4), 042108
- https://doi.org/10.1063/1.2838354
Abstract
This letter shows that a moderate degree of edge disorder can explain the fact that the experimentally measured bandgaps of graphenenanoribbons (GNRs) do not depend on orientation. We argue that GNRs actually behave similarly to Anderson insulators and the measured bandgaps should thus be interpreted as quasi-mobility edges. Calculations in the tight binding approach reveal that in the presence of edge disorder, quasi-mobility edge and electronic structures become independent of orientation and that quasi-mobility edge follows a quasi-universal law similar to experimental data, although with different parameters.This publication has 20 references indexed in Scilit:
- Simulation of Graphene Nanoribbon Field-Effect TransistorsIEEE Electron Device Letters, 2007
- Performance Projections for Ballistic Graphene Nanoribbon Field-Effect TransistorsIEEE Transactions on Electron Devices, 2007
- A Graphene Field-Effect DeviceIEEE Electron Device Letters, 2007
- Comparison of performance limits for carbon nanoribbon and carbon nanotube transistorsApplied Physics Letters, 2006
- Electronic Confinement and Coherence in Patterned Epitaxial GrapheneScience, 2006
- Analysis of graphene nanoribbons as a channel material for field-effect transistorsApplied Physics Letters, 2006
- Experimental observation of the quantum Hall effect and Berry's phase in grapheneNature, 2005
- Electric Field Effect in Atomically Thin Carbon FilmsScience, 2004
- Edge state in graphene ribbons: Nanometer size effect and edge shape dependencePhysical Review B, 1996
- Peculiar Localized State at Zigzag Graphite EdgeJournal of the Physics Society Japan, 1996