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Issue 37, 2015
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Conductance signatures of electron confinement induced by strained nanobubbles in graphene

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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.

Graphical abstract: Conductance signatures of electron confinement induced by strained nanobubbles in graphene

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Article information


Submitted
22 May 2015
Accepted
13 Aug 2015
First published
24 Aug 2015

Nanoscale, 2015,7, 15300-15309
Article type
Paper
Author version available

Conductance signatures of electron confinement induced by strained nanobubbles in graphene

D. A. Bahamon, Z. Qi, H. S. Park, V. M. Pereira and D. K. Campbell, Nanoscale, 2015, 7, 15300
DOI: 10.1039/C5NR03393D

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