Ballistic tracks in graphene nanoribbons

Johannes Aprojanz, Stephen R. Power, Pantelis Bampoulis, Stephan Roche, Antti-Pekka Jauho, Harold J. W. Zandvliet, Alexei A. Zakharov, Christoph Tegenkamp*

*Corresponding author for this work

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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 path-ways for quantum information device concepts.
Original languageEnglish
Article number4426
JournalNature Communications
Volume9
Issue number1
Number of pages6
ISSN2041-1723
DOIs
Publication statusPublished - 2018

Cite this

Aprojanz, J., Power, S. R., Bampoulis, P., Roche, S., Jauho, A-P., Zandvliet, H. J. W., Zakharov, A. A., & Tegenkamp, C. (2018). Ballistic tracks in graphene nanoribbons. Nature Communications, 9(1), [4426]. https://doi.org/10.1038/s41467-018-06940-5