Perfect Reflection of Chiral Fermions in Gated Graphene Nanoribbons

We describe the results of a theoretical study of transport through gated metallic graphene nanoribbons using a nonequilibrium Green function method. Although analogies with quantum field theory predict perfect transmission of chiral fermions through gated regions in one dimension, we find perfect r...

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Veröffentlicht in:	Nano letters 2009-05, Vol.9 (5), p.1980-1983
Hauptverfasser:	Kinder, Jesse M, Dorando, Jonathan J, Wang, Haitao, Chan, Garnet Kin-Lic
Format:	Artikel
Sprache:	eng
Schlagworte:	Cross-disciplinary physics: materials science rheology Exact sciences and technology Fullerenes and related materials diamonds, graphite Materials science Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Nanotubes Physics Specific materials
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Zusammenfassung:	We describe the results of a theoretical study of transport through gated metallic graphene nanoribbons using a nonequilibrium Green function method. Although analogies with quantum field theory predict perfect transmission of chiral fermions through gated regions in one dimension, we find perfect reflection of chiral fermions in armchair ribbons for specific configurations of the gate. This effect should be measurable in narrow graphene constrictions gated by a charged carbon nanotube.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl900227e