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Issue 22, 2016

Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime

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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.

Graphical abstract: Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime

Supplementary files

Article information


Submitted
08 Jan 2016
Accepted
04 May 2016
First published
06 May 2016

This article is Open Access

Nanoscale, 2016,8, 11480-11486
Article type
Paper

Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime

E. Tóvári, P. Makk, P. Rickhaus, C. Schönenberger and S. Csonka, Nanoscale, 2016, 8, 11480 DOI: 10.1039/C6NR00187D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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