title: Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime.
abstract: We report on the observation of periodic conductance oscillations near quantum Hall plateaus in suspended graphene nanoribbons. They are attributed to single quantum dots that are formed in the narrowest part of the ribbon, in the valleys and hills of a disorder potential. In a wide flake with two gates, a double-dot system's signature has been observed. Electrostatic confinement is enabled in single-layer graphene due to the gaps that are formed between the Landau levels, suggesting a way to create gate-defined quantum dots that can be accessed with quantum Hall edge states.
authors.affiliation: Department of Physics, Budapest University of Technology and Economics, and Condensed Matter Research Group of the Hungarian Academy of Sciences, Budafoki út 8, 1111 Budapest, Hungary. csonka@mono.eik.bme.hu.
authors.forename: Endre
authors.initials: E
authors.lastname: Tóvári
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
authors.forename: Péter
authors.initials: P
authors.lastname: Makk
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
authors.forename: Peter
authors.initials: P
authors.lastname: Rickhaus
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
authors.forename: Christian
authors.initials: C
authors.lastname: Schönenberger
authors.affiliation: Department of Physics, Budapest University of Technology and Economics, and Condensed Matter Research Group of the Hungarian Academy of Sciences, Budafoki út 8, 1111 Budapest, Hungary. csonka@mono.eik.bme.hu.
authors.forename: Szabolcs
authors.initials: S
authors.lastname: Csonka