Photo report

Graphene, a new material for metrology

Until now, the standard for electrical resistance was created thanks to the quantum Hall effect in semiconducting devices made of gallium arsenide.
However, using this material required very low temperatures and strong magnetic fields, which were only possible to obtain in a few national intitutes of metrology. It is now proven that the electrical properties of graphene make it possible to realize a very precise resistance standard, in far more practical conditions compatible with cooling devices without helium.

Scientific topics

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