Conductance signatures of electron confinement induced by strained nanobubbles in graphene

Bahamon D.A.; Qi Z.; Park H.S.; Pereira V.M.; Campbell D.K.

Conductance signatures of electron confinement induced by strained nanobubbles in graphene

Tipo

Artigo

Data de publicação

2015

Periódico

Nanoscale

Citações (Scopus)

33

Autores

Bahamon D.A.
Qi Z.
Park H.S.
Pereira V.M.
Campbell D.K.

Resumo

© 2015 The Royal Society of Chemistry.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.

Assuntos Scopus

Armchair graphene nanoribbons , Clamping conditions , Density of state , Electron confinement , Graphene nanoribbons , Low energy electrons , Propagating mode , Substrate interaction