Publication date: 11th July 2022
Within the field of metrology, universal constants are used to define every and each of the International System of Units. Particularly, the definition of the resistance unit (Ohm), has been routinely obtained from measurements of the Quantum Hall Effect on 2D electron gases at the interface of the AlGaAs/GaAs heterostructure. However, while this geometry is robust, it requires stringent measurement conditions (very low temperatures and very high magnetic fields) which are only achievable in a few high-tech metrology labs around the globe. To spread the use of standardization for end-users, metrologists are exploring novel materials as an alternative [1,2].
Here we show results from the European COMET project, sponsored by EMPIR/EURAMET, which aims to develop a novel Quantum Hall Resistance Standard (QHRS) based on two dimensional lattices of covalent- and metal-organic frameworks. The highly tunable nature of these materials holds the potential for developing QHRS measurements under less demanding conditions when compared with conventional approaches. This goal could help expand the employment of standardization protocols for industrial end-users.
The project EMPIR 20FUN03 COMET Two dimensional lattices of covalent- and metal- organic frameworks for the Quantum Hall resistance standard is financed by the European Metrology Programme for Innovation and Research (EMPIR), co-financed by the participating states and the research and innovation program of the European Union, Horizon 2020.
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