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Conductance enlargement in picoscale electroburnt graphene nanojunctions

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Sadeghi, Hatef, Mol, Jan A., Lau, Chit Siong, Briggs, G. Andrew D., Warner, Jamie and Lambert, Colin J. (2015) Conductance enlargement in picoscale electroburnt graphene nanojunctions. Proceedings of the National Academy of Sciences of the United States of America, 112 (9). pp. 2658-2663. doi:10.1073/pnas.1418632112

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Official URL: http://dx.doi.org/10.1073/pnas.1418632112

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Abstract

Provided the electrical properties of electroburnt graphene junctions can be understood and controlled, they have the potential to underpin the development of a wide range of future sub-10-nm electrical devices. We examine both theoretically and experimentally the electrical conductance of electroburnt graphene junctions at the last stages of nanogap formation. We account for the appearance of a counterintuitive increase in electrical conductance just before the gap forms. This is a manifestation of room-temperature quantum interference and arises from a combination of the semimetallic band structure of graphene and a cross-over from electrodes with multiple-path connectivity to single-path connectivity just before breaking. Therefore, our results suggest that conductance enlargement before junction rupture is a signal of the formation of electroburnt junctions, with a picoscale current path formed from a single sp2 bond.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH): Graphene -- Electric properties, Nanoelectronics, Quantum interference
Journal or Publication Title: Proceedings of the National Academy of Sciences of the United States of America
Publisher: National Academy of Sciences
ISSN: 0027-8424
Official Date: 3 March 2015
Dates:
DateEvent
3 March 2015Published
17 February 2015Available
21 January 2015Accepted
Date of first compliant deposit: 24 February 2020
Volume: 112
Number: 9
Page Range: pp. 2658-2663
DOI: 10.1073/pnas.1418632112
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/K001507/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/J014753/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/H035818/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/J015067/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
606728FP7 People: Marie-Curie Actionshttp://dx.doi.org/10.13039/100011264
UNSPECIFIEDAgency for Science, Technology and Researchhttp://dx.doi.org/10.13039/501100001348
UNSPECIFIEDOxford Martin School, University of Oxfordhttp://dx.doi.org/10.13039/501100004211
UNSPECIFIEDTempleton World Charity Foundationhttp://dx.doi.org/10.13039/501100011730
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