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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
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 | |||||||||||||||||||||||||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| 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: |
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| 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: |
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