Conductance signatures of electron confinement induced by strained nanobubbles in graphene

Nanoscale
Dario A BahamonDavid K Campbell

Abstract

We investigate the impact of strained nanobubbles on the conductance characteristics of graphene nanoribbons using a combined molecular dynamics - tight-binding simulation scheme. We describe in detail how the conductance, density of states, and current density of zigzag or armchair graphene nanoribbons are modified by the presence of a nanobubble. In particular, we establish that low-energy electrons can be confined in the vicinity of or within the nanobubbles by the delicate interplay among the pseudomagnetic field pattern created by the shape of the bubble, mode mixing, and substrate interaction. The coupling between confined evanescent states and propagating modes can be enhanced under different clamping conditions, which translates into Fano resonances in the conductance traces.

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Citations

Apr 27, 2017·Nanoscale·Nicolas LeconteSuyong Jung
Mar 17, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Maurice Oliva-Leyva, Chumin Wang
May 26, 2017·Reports on Progress in Physics·Gerardo G NaumisHumberto Terrones
Sep 2, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Enrique Muñoz, Rodrigo Soto-Garrido
Feb 2, 2017·Beilstein Journal of Nanotechnology·Carlos J PáezPeter A Schulz
Jan 14, 2017·Physical Review Letters·Mikkel SettnesAntti-Pekka Jauho

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