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- [www.ncbi.nlm.nih.gov] | PDF
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- [www.ncbi.nlm.nih.gov] | PDF
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Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime
Journal article published in 2016 by
Endre Tóvári,
Peter Makk,
Peter Rickhaus,
Christian Schonenberger,
C. Schönenberger,
Szabolcs Csonka
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.