Scaling approach to tight-binding transport in realistic graphene devices:the case of transverse magnetic focusing

Beconcini, M. and Valentini, S. and Krishna Kumar, Roshan and Auton, G. H. and Geim, A. K. and Ponomarenko, Leonid Alexandrovich and Polini, Marco and Taddei, F. (2016) Scaling approach to tight-binding transport in realistic graphene devices:the case of transverse magnetic focusing. Physical review B, 94 (11). ISSN 1098-0121

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Abstract

Ultraclean graphene sheets encapsulated between hexagonal boron nitride crystals host two-dimensional electron systems in which low-temperature transport is solely limited by the sample size. We revisit the theoretical problem of carrying out microscopic calculations of nonlocal ballistic transport in such micron-scale devices. By employing the Landauer-Büttiker scattering theory, we propose a scaling approach to tight-binding nonlocal transport in realistic graphene devices. We test our numerical method against experimental data on transverse magnetic focusing (TMF), a textbook example of nonlocal ballistic transport in the presence of a transverse magnetic field. This comparison enables a clear physical interpretation of all the observed features of the TMF signal, including its oscillating sign.

Item Type: Journal Article
Journal or Publication Title: Physical review B
Additional Information: ©2016 American Physical Society
Departments: Faculty of Science and Technology > Physics
ID Code: 83211
Deposited By: ep_importer_pure
Deposited On: 28 Nov 2016 15:04
Refereed?: Yes
Published?: Published
Last Modified: 15 Sep 2019 02:25
URI: https://eprints.lancs.ac.uk/id/eprint/83211

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