Quantum interference in DNA bases probed by graphene nanoribbons

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Based on first-principles nonequilibrium Green's function calculations, we demonstrate quantum interference (QI) effects on the tunneling conductance of deoxyribonucleic acid bases placed between zigzag graphene nanoribbon electrodes. With the analogy of QI in hydrocarbon ring structures, we hypothesize that QI can be well preserved in the pi-pi coupling between the carbon-based electrode and a single DNA base. We demonstrate indications of QI, such as destructively interfered anti-resonance or Fano-resonance, that affect the variation of tunneling conductance depending on the orientation of a base. We find that guanine, with a 10-fold higher transverse conductance, can be singled out from the other bases. (C) 2013 AIP Publishing LLC.
Publisher
AMER INST PHYSICS
Issue Date
2013-07
Language
English
Article Type
Article
Citation

APPLIED PHYSICS LETTERS, v.103, no.2, pp.023701 - 023701

ISSN
0003-6951
DOI
10.1063/1.4813418
URI
http://hdl.handle.net/10203/175572
Appears in Collection
EE-Journal Papers(저널논문)
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