TY - JOUR
T1 - Ballistic tracks in graphene nanoribbons
AU - Aprojanz, Johannes
AU - Power, Stephen R.
AU - Bampoulis, Pantelis
AU - Roche, Stephan
AU - Jauho, Antti Pekka
AU - Zandvliet, Harold J.W.
AU - Zakharov, Alexei A.
AU - Tegenkamp, Christoph
PY - 2018/10/24
Y1 - 2018/10/24
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85055462363&partnerID=8YFLogxK
U2 - 10.1038/s41467-018-06940-5
DO - 10.1038/s41467-018-06940-5
M3 - Article
C2 - 30356162
AN - SCOPUS:85055462363
SN - 2041-1723
VL - 9
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 4426
ER -