Details
| Original language | English |
|---|---|
| Article number | 014025 |
| Number of pages | 12 |
| Journal | Physical review applied |
| Volume | 23 |
| Issue number | 1 |
| Publication status | Published - 13 Jan 2025 |
Abstract
Quantum Hall resistance (QHR) standards play an essential role in the traceability route for the units ohm, farad, ampere, and kilogram in the revised International System of Units (SI). While the primary realization of the unit ohm is still mainly based on GaAs QHR standards in extreme conditions, epitaxial graphene on SiC is a promising alternative to develop QHR standards operating under relaxed conditions due to its wide Landau level splitting and strong Fermi level pinning. Here, we show that epitaxial graphene QHR standards can be operated to reach a high accuracy of less than 2 nω/ω (two parts per billion) at a moderate magnetic flux density of B = 4.5 T, high current of I = 232.5 μA, and easier to access temperature of T = 4.2 K, simultaneously. Repeated measurements in these relaxed conditions over 2.5 years demonstrate the temporal stability and robustness of the QHR standard with an accuracy of 2nω/ω. Furthermore, the accuracy of the graphene QHR standards has been maintained without any indications of degradation, even after experiencing long-distance transport of more than 800 km between two metrology institutes. When implemented, graphene QHR standards may lead to broader dissemination of primary resistance standards beyond national metrology institutes, extending to calibration laboratories and industry on-site.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review applied, Vol. 23, No. 1, 014025, 13.01.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Graphene quantum Hall resistance standard for realizing the unit of electrical resistance under relaxed experimental conditions
AU - Yin, Yefei
AU - Kruskopf, Mattias
AU - Gournay, Pierre
AU - Rolland, Benjamin
AU - Götz, Martin
AU - Pesel, Eckart
AU - Tschirner, Teresa
AU - Momeni, Davood
AU - Chatterjee, Atasi
AU - Hohls, Frank
AU - Pierz, Klaus
AU - Scherer, Hansjörg
AU - Haug, Rolf J.
AU - Schumacher, Hans Werner
N1 - Publisher Copyright: © 2025 American Physical Society.
PY - 2025/1/13
Y1 - 2025/1/13
N2 - Quantum Hall resistance (QHR) standards play an essential role in the traceability route for the units ohm, farad, ampere, and kilogram in the revised International System of Units (SI). While the primary realization of the unit ohm is still mainly based on GaAs QHR standards in extreme conditions, epitaxial graphene on SiC is a promising alternative to develop QHR standards operating under relaxed conditions due to its wide Landau level splitting and strong Fermi level pinning. Here, we show that epitaxial graphene QHR standards can be operated to reach a high accuracy of less than 2 nω/ω (two parts per billion) at a moderate magnetic flux density of B = 4.5 T, high current of I = 232.5 μA, and easier to access temperature of T = 4.2 K, simultaneously. Repeated measurements in these relaxed conditions over 2.5 years demonstrate the temporal stability and robustness of the QHR standard with an accuracy of 2nω/ω. Furthermore, the accuracy of the graphene QHR standards has been maintained without any indications of degradation, even after experiencing long-distance transport of more than 800 km between two metrology institutes. When implemented, graphene QHR standards may lead to broader dissemination of primary resistance standards beyond national metrology institutes, extending to calibration laboratories and industry on-site.
AB - Quantum Hall resistance (QHR) standards play an essential role in the traceability route for the units ohm, farad, ampere, and kilogram in the revised International System of Units (SI). While the primary realization of the unit ohm is still mainly based on GaAs QHR standards in extreme conditions, epitaxial graphene on SiC is a promising alternative to develop QHR standards operating under relaxed conditions due to its wide Landau level splitting and strong Fermi level pinning. Here, we show that epitaxial graphene QHR standards can be operated to reach a high accuracy of less than 2 nω/ω (two parts per billion) at a moderate magnetic flux density of B = 4.5 T, high current of I = 232.5 μA, and easier to access temperature of T = 4.2 K, simultaneously. Repeated measurements in these relaxed conditions over 2.5 years demonstrate the temporal stability and robustness of the QHR standard with an accuracy of 2nω/ω. Furthermore, the accuracy of the graphene QHR standards has been maintained without any indications of degradation, even after experiencing long-distance transport of more than 800 km between two metrology institutes. When implemented, graphene QHR standards may lead to broader dissemination of primary resistance standards beyond national metrology institutes, extending to calibration laboratories and industry on-site.
UR - http://www.scopus.com/inward/record.url?scp=85214935057&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.23.014025
DO - 10.1103/PhysRevApplied.23.014025
M3 - Article
AN - SCOPUS:85214935057
VL - 23
JO - Physical review applied
JF - Physical review applied
SN - 2331-7019
IS - 1
M1 - 014025
ER -