Journal article
Giant quantum Hall plateaus generated by charge transfer in epitaxial graphene
- Abstract:
- Epitaxial graphene has proven itself to be the best candidate for quantum electrical resistance standards due to its wide quantum Hall plateaus with exceptionally high breakdown currents. However one key underlying mechanism, a magnetic field dependent charge transfer process, is yet to be fully understood. Here we report measurements of the quantum Hall effect in epitaxial graphene showing the widest quantum Hall plateau observed to date extending over 50 T, attributed to an almost linear increase in carrier density with magnetic field. This behaviour is strong evidence for field dependent charge transfer from charge reservoirs with exceptionally high densities of states in close proximity to the graphene. Using a realistic framework of broadened Landau levels we model the densities of donor states and predict the field dependence of charge transfer in excellent agreement with experimental results, thus providing a guide towards engineering epitaxial graphene for applications such as quantum metrology
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.7MB, Terms of use)
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- Publisher copy:
- 10.1038/srep30296
Authors
+ Ministry of Trade, Industry
& Energy, Republic of Korea
More from this funder
- Grant:
- 20148520011250
- Publisher:
- Nature Publishing Group
- Journal:
- Scientific Reports More from this journal
- Publication date:
- 2016-07-26
- Acceptance date:
- 2016-06-24
- DOI:
- ISSN:
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2045-2322
- Pubs id:
-
pubs:631762
- UUID:
-
uuid:9488ba58-c79d-46d0-838b-88e85f8ea021
- Local pid:
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pubs:631762
- Source identifiers:
-
631762
- Deposit date:
-
2016-07-04
Terms of use
- Copyright holder:
- Alexander-Webber et al
- Copyright date:
- 2016
- Notes:
- © 2016 Alexander-Webber et al. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
- Licence:
- CC Attribution (CC BY)
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