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Electronic structure and quantum transport properties of trilayers formed from graphene and boron nitride
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2012 (English)In: Nanoscale, ISSN 2040-3364, Vol. 4, no 17, 5490-5498 p.Article in journal (Refereed) Published
Abstract [en]

We report the results of a theoretical study of graphene/BN/graphene and BN/graphene/BN trilayers using the van-der-Waals-corrected density functional theory in conjunction with the non-equilibrium Green's Function method. These trilayer systems formed from graphene and BN exhibit distinct stacking-dependent features in their ground state electronic structure and response to an applied electric field perpendicular to the trilayer planes. The graphene/BN/graphene system shows a negligible gap in the electronic band structure that increases for the AAA and ABA stackings under an external electric field, while the zero-field band gap of BN/graphene/BN remains unaffected by the electric field. When both types of trilayer systems are contacted with gold electrodes, a metal-like conduction is predicted in the low-field regime, which changes to a p-type conduction with an increase in the applied perpendicular bias field.

Place, publisher, year, edition, pages
2012. Vol. 4, no 17, 5490-5498 p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-181148DOI: 10.1039/c2nr31310cISI: 000307439900033OAI: oai:DiVA.org:uu-181148DiVA: diva2:553096
Available from: 2012-09-18 Created: 2012-09-17 Last updated: 2012-09-18Bibliographically approved

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Scheicher, Ralph H.

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