Hexagonal-boron nitride substrates for electroburnt graphene nanojunctions

Sadeghi, Hatef and Sangtarash, Sara and Lambert, Colin (2016) Hexagonal-boron nitride substrates for electroburnt graphene nanojunctions. Physica E: Low-dimensional Systems and Nanostructures, 82. pp. 12-15. ISSN 1386-9477

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Abstract

We examine the effect of a hexagonal boron nitride (hBN) substrate on electron transport through graphene nanojunctions just before gap formation. Junctions in vacuum and on hBN are formed using classical molecular dynamics to create initial structures, followed by relaxation using density functional theory. We find that the hBN only slightly reduces the current through the junctions at low biases. Furthermore due to quantum interference at the last moments of breaking, the current though a single carbon filament spanning the gap is found to be higher than the current through two filaments spanning the gap in parallel. This feature is present both in the presence of absence of hBN.

Item Type:

Journal Article

Journal or Publication Title:

Physica E: Low-dimensional Systems and Nanostructures

Additional Information:

This is the author’s version of a work that was accepted for publication in Physica E. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physica E, 82, 2016 DOI: 10.1016/j.physe.2015.09.005

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/3100/3107

Subjects:

?? molecular electronicselectroburninggrapheneboron nitridequantum interferenceatomic and molecular physics, and opticselectronic, optical and magnetic materialscondensed matter physics ??

Departments:

Faculty of Science and Technology > Physics

ID Code:

77065

Deposited By:

ep_importer_pure

Deposited On:

14 Dec 2015 11:30

Refereed?:

Yes

Published?:

Published

Last Modified:

12 Oct 2024 00:05

URI:

https://eprints.lancs.ac.uk/id/eprint/77065