Conductance Through Graphene Bends and Polygons

Details Conductance Through Graphene Bends and Polygons Conductance Through Graphene Bends and Polygons

2008-04-01

arxiv.org/abs/0804.0246v1

Phys. Rev. B 78, 235411 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 21 figures

Scientific paper

10.1103/PhysRevB.78.235411

We investigate the transmission of electrons between conducting nanoribbon leads oriented at multiples of 60 degrees with respect to one another, connected either directly or through graphene polygons. A mode-matching analysis suggests that the transmission at low-energies is sensitive to the precise way in which the ribbons are joined. Most strikingly, we find that armchair leads forming 120-degree angles can support either a large transmission or a highly suppressed transmission, depending on the specific geometry. Tight-binding calculations demonstrate the effects in detail, and are also used to study transmission at higher energies as well as for zigzag ribbon leads.

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