Comparison between NIST Graphene and AIST GaAs Quantized Hall Devices.

Autor: Oe T; National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8563, Japan., Rigosi AF; National Institute of Standards and Technology, Gaithersburg, MD 20899, USA., Kruskopf M; University of Maryland, Joint Quantum Institute, College Park, MD 20742, USA., Wu BY; Graduate Institute of Applied Physics, National Taiwan University, Taipei 10617, Taiwan., Lee HY; Theiss Research, La Jolla, CA 92037, USA., Yang Y; University of Maryland, Joint Quantum Institute, College Park, MD 20742, USA., Elmquist RE; National Institute of Standards and Technology, Gaithersburg, MD 20899, USA., Kaneko NH; National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8563, Japan., Jarrett DG; National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
Jazyk: angličtina
Zdroj: IEEE transactions on instrumentation and measurement [IEEE Trans Instrum Meas] 2019; Vol. 0.
DOI: 10.1109/tim.2019.2930436
Abstrakt: Several graphene quantized Hall resistance (QHR) devices manufactured at the National Institute of Standards and Technology (NIST) were compared to GaAs QHR devices and a 100 Ω standard resistor at the National Institute for Advanced Industrial Science and Technology (AIST). Measurements of the 100 Ω resistor with the graphene QHR devices agreed within 5 nΩ/Ω of the values for the 100 Ω resistor obtained through GaAs measurements. The electron density of the graphene devices was adjusted at AIST to restore device properties such that operation was possible at low magnetic flux densities of 4 T to 6 T. This adjustment was accomplished with a functionalization method utilized at NIST, allowing for consistent tunability of the graphene QHR devices with simple annealing. Such a method replaces older and less predictable methods for adjusting graphene for metrological suitability. The milestone results demonstrate the ease with which graphene can be used to make resistance comparison measurements among many National Metrology Institutes.
Databáze: MEDLINE
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