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Quantum Transport in Graphene Nanoribbons: Effects of Edge Reconstruction and Chemical Reactivity

AuthorsBiel, Blanca; Charlier, Jean-Christopher; Roche, Stephan
KeywordsGraphene nanoribbons
Quantum transport
Edge reactivity
Issue Date2010
PublisherAmerican Chemical Society
CitationACS Nano 4(4): 1971-1976 (2010)
AbstractWe present first-principles transport calculations of graphene nanoribbons with chemically reconstructed edge profiles. Depending on the geometry of the defect and the degree of hydrogenation, spectacularly different transport mechanisms are obtained. In the case of monohydrogenated pentagon (heptagon) defects, an effective acceptor (donor) character results in strong electron−hole conductance asymmetry. In contrast, weak backscattering is obtained for defects that preserve the benzenoid structure of graphene. Based on a tight-binding model derived from ab initio calculations, evidence for large conductance scaling fluctuations are found in disordered ribbons with lengths up to the micrometer scale.
Description6 páginas.-- et al.
Publisher version (URL)http://dx.doi.org/10.1021/nn100028q
Appears in Collections:(CIN2) Artículos
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