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Hybridization effects on the out-of-plane electron tunneling properties of monolayers: is h-BN more conductive than graphene?
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2014 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 25, no 34, 345703- p.Article in journal (Refereed) Published
Abstract [en]

Electron transport properties through multilayers of hexagonal boron nitride (h-BN) sandwiched between gold electrodes is investigated by density functional theory together with the non-equilibrium Green's function method. The calculated results find that despite graphene being a gapless semimetal and h-BN two-dimensional layer being an insulator, the transmission function perpendicular to the atomic layer plane in both systems is nearly identical. The out-of-plane tunnel current is found to be strongly dependent on the interaction at the interface of the device. As a consequence, single layer h-BN coupled with atomically flat weakly interacting metals such as gold may not work as a good dielectric material, but the absence of sharp resonances would probably lead to more stable out-of-plane electronic transport properties compared to graphene.

Place, publisher, year, edition, pages
2014. Vol. 25, no 34, 345703- p.
Keyword [en]
BN monolayer, electron transport, graphene
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-234200DOI: 10.1088/0957-4484/25/34/345703ISI: 000341807100017OAI: oai:DiVA.org:uu-234200DiVA: diva2:758601
Available from: 2014-10-27 Created: 2014-10-15 Last updated: 2017-12-05Bibliographically approved

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Amorim, Rodrigo G.

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