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

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 g...

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Autores principales: Tóvári, Endre, Makk, Péter, Rickhaus, Peter, Schönenberger, Christian, Csonka, Szabolcs
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2016
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5315012/
https://www.ncbi.nlm.nih.gov/pubmed/27198562
http://dx.doi.org/10.1039/c6nr00187d
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author Tóvári, Endre
Makk, Péter
Rickhaus, Peter
Schönenberger, Christian
Csonka, Szabolcs
author_facet Tóvári, Endre
Makk, Péter
Rickhaus, Peter
Schönenberger, Christian
Csonka, Szabolcs
author_sort Tóvári, Endre
collection PubMed
description 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.
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spelling pubmed-53150122017-03-01 Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime Tóvári, Endre Makk, Péter Rickhaus, Peter Schönenberger, Christian Csonka, Szabolcs Nanoscale Chemistry 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. Royal Society of Chemistry 2016-06-14 2016-05-06 /pmc/articles/PMC5315012/ /pubmed/27198562 http://dx.doi.org/10.1039/c6nr00187d Text en This journal is © The Royal Society of Chemistry 2016 http://creativecommons.org/licenses/by/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Chemistry
Tóvári, Endre
Makk, Péter
Rickhaus, Peter
Schönenberger, Christian
Csonka, Szabolcs
Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime
title Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime
title_full Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime
title_fullStr Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime
title_full_unstemmed Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime
title_short Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime
title_sort signatures of single quantum dots in graphene nanoribbons within the quantum hall regime
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5315012/
https://www.ncbi.nlm.nih.gov/pubmed/27198562
http://dx.doi.org/10.1039/c6nr00187d
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