In the last decade, quantum resistance metrology has benefited from the application of graphene as the base material for the fabrication of quantum Hall (QH) resistance standards since it allows for the realization of the resistance unit ohm in the revised International System of Units under relaxed experimental conditions. Here, we present a detailed magnetotransport investigation of p-type epitaxial graphene, which was doped by the molecular acceptor F4-TCNQ. High-accuracy measurements of the QH resistance show an excellent quantization and a reproduction of the nominal value, the half of the von Klitzing constant RK/2, within 2 nΩ/Ω. It underlines the universality of the QH effect and shows that p-type epitaxial graphene can also serve as the basis for future resistance standards for operation at relaxed experimental conditions. For the p-type devices, the onset of the QH plateau is observed at about 1 T higher magnetic fields, which can be attributed to an additional disorder or a non-symmetric charge transfer mechanism in the QH regime.
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5 August 2024
Research Article|
August 06 2024
Quantum Hall resistance standards based on epitaxial graphene with p-type conductivity
Special Collection:
Advances in Quantum Metrology
Yefei Yin
;
Yefei Yin
a)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Physikalisch-Technische Bundesanstalt
, Bundesallee 100, 38116 Braunschweig, Germany
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Mattias Kruskopf
;
Mattias Kruskopf
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Physikalisch-Technische Bundesanstalt
, Bundesallee 100, 38116 Braunschweig, Germany
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Stephan Bauer;
Stephan Bauer
(Data curation, Formal analysis, Resources, Writing – review & editing)
1
Physikalisch-Technische Bundesanstalt
, Bundesallee 100, 38116 Braunschweig, Germany
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Teresa Tschirner
;
Teresa Tschirner
(Data curation, Project administration, Visualization, Writing – review & editing)
1
Physikalisch-Technische Bundesanstalt
, Bundesallee 100, 38116 Braunschweig, Germany
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Klaus Pierz
;
Klaus Pierz
a)
(Conceptualization, Funding acquisition, Investigation, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing)
1
Physikalisch-Technische Bundesanstalt
, Bundesallee 100, 38116 Braunschweig, Germany
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Frank Hohls
;
Frank Hohls
(Conceptualization, Funding acquisition, Investigation, Project administration, Writing – review & editing)
1
Physikalisch-Technische Bundesanstalt
, Bundesallee 100, 38116 Braunschweig, Germany
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Rolf J. Haug
;
Rolf J. Haug
(Funding acquisition, Investigation, Project administration, Supervision, Writing – review & editing)
2
Institut für Festkörperphysik, Leibniz Universität Hannover
, 30167 Hannover, Germany
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Hans W. Schumacher
Hans W. Schumacher
(Conceptualization, Funding acquisition, Investigation, Project administration, Resources, Supervision, Writing – review & editing)
1
Physikalisch-Technische Bundesanstalt
, Bundesallee 100, 38116 Braunschweig, Germany
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Appl. Phys. Lett. 125, 064001 (2024)
Article history
Received:
June 17 2024
Accepted:
July 26 2024
Citation
Yefei Yin, Mattias Kruskopf, Stephan Bauer, Teresa Tschirner, Klaus Pierz, Frank Hohls, Rolf J. Haug, Hans W. Schumacher; Quantum Hall resistance standards based on epitaxial graphene with p-type conductivity. Appl. Phys. Lett. 5 August 2024; 125 (6): 064001. https://doi.org/10.1063/5.0223723
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