Ballistic tracks in graphene nanoribbons
Aprojanz, Johannes (Technische Universität Chemnitz. Institut für Physik)
Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia)
Bampoulis, Pantelis (Leibniz Universität Hannover. Institut für Festkörperphysik)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene)
Zandvliet, Harold J. W. (University of Twente. Physics of Interfaces and Nanomaterials)
Zakharov, Alexei A. (Lund University. MAX IV Laboratory)
Tegenkamp, C. (Institut für Festkörperphysik. Leibniz Universität Hannover)

Date:	2018
Abstract:	High quality graphene nanoribbons epitaxially grown on the sidewalls of silicon carbide (SiC) mesa structures stand as key building blocks for graphene-based nanoelectronics. Such ribbons display 1D single-channel ballistic transport at room temperature with exceptionally long mean free paths. Here, using spatially-resolved two-point probe (2PP) measurements, we selectively access and directly image a range of individual transport modes in sidewall ribbons. The signature of the independently contacted channels is a sequence of quantised conductance plateaus for different probe positions. These result from an interplay between edge magnetism and asymmetric terminations at opposite ribbon edges due to the underlying SiC structure morphology. Our findings demonstrate a precise control of transport through multiple, independent, ballistic tracks in graphene-based devices, opening intriguing pathways for quantum information device concepts.
Grants:	European Commission 665919 Ministerio de Economía y Competitividad FIS2015-67767-P Ministerio de Economía y Competitividad FIS2015-64886-C5-3-P European Commission 785219 Ministerio de Economía y Competitividad SEV-2013-0295
Note:	Altres ajuts: CERCA Programme/Generalitat de Catalunya
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Nature communications, Vol. 9 (October 2018) , art. 4426, ISSN 2041-1723

DOI: 10.1038/s41467-018-06940-5
PMID: 30356162

6 p, 1.4 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles