Mini array of quantum Hall devices based on epitaxial graphene

Series connection of four quantum Hall effect (QHE) devices based on epitaxial graphene films was studied for realization of a quantum resistance standard with an up-scaled value. The tested devices showed quantum Hall plateaux R H,2 at a filling factor v = 2 starting from a relatively low magnetic...

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Bibliographic Details
Published in:Journal of applied physics 2016-05, Vol.119 (17)
Main Authors: Novikov, S., Lebedeva, N., Hämäläinen, J., Iisakka, I., Immonen, P., Manninen, A. J., Satrapinski, A.
Format: Article
Language:English
Subjects:
ACCURACY
Applied physics
BONDING
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Devices
EPITAXY
GRAPHENE
HALL EFFECT
JOINTS
MAGNETIC FIELDS
Quantum Hall effect
WIRES
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Summary:Series connection of four quantum Hall effect (QHE) devices based on epitaxial graphene films was studied for realization of a quantum resistance standard with an up-scaled value. The tested devices showed quantum Hall plateaux R H,2 at a filling factor v = 2 starting from a relatively low magnetic field (between 4 T and 5 T) when the temperature was 1.5 K. The precision measurements of quantized Hall resistance of four QHE devices connected by triple series connections and external bonding wires were done at B = 7 T and T = 1.5 K using a commercial precision resistance bridge with 50 μA current through the QHE device. The results showed that the deviation of the quantized Hall resistance of the series connection of four graphene-based QHE devices from the expected value of 4×R H,2 = 2 h/e 2 was smaller than the relative standard uncertainty of the measurement (
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4948675