Quantum interference in graphene nanoconstrictions

Gehring, Pascal and Sadeghi, Hatef and Sangtarash, Sara and Lau, Chit Siong and Liu, Junjie and Ardavan, Arzhang and Warner, Jamie H. and Lambert, Colin J. and Briggs, G. Andrew D. and Mol, Jan A. (2016) Quantum interference in graphene nanoconstrictions. Nano Letters, 16 (7). pp. 4210-4216. ISSN 1530-6984

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We report quantum interference effects in the electrical conductance of chemical vapor deposited graphene nanoconstrictions fabricated using feedback controlled electroburning. The observed multimode Fabry–Pérot interferences can be attributed to reflections at potential steps inside the channel. Sharp antiresonance features with a Fano line shape are observed. Theoretical modeling reveals that these Fano resonances are due to localized states inside the constriction, which couple to the delocalized states that also give rise to the Fabry–Pérot interference patterns. This study provides new insight into the interplay between two fundamental forms of quantum interference in graphene nanoconstrictions.

Item Type: Journal Article
Journal or Publication Title: Nano Letters
Additional Information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright ©2016 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b01104
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3104
Departments: Faculty of Science and Technology > Physics
ID Code: 80604
Deposited By: ep_importer_pure
Deposited On: 03 Aug 2016 10:22
Refereed?: Yes
Published?: Published
Last Modified: 15 Oct 2019 03:46
URI: https://eprints.lancs.ac.uk/id/eprint/80604

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