Mise en place d'un échantillon de graphène pour une observation de la morphologie de sa surface par…
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Echantillon de graphène mis en place sur un microscope à force atomique
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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.
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