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.
Substrat de carbure de silicium clivé, pour une croissance de graphène par dépôt chimique en phase vapeur
Clivage d'un substrat de carbure de silicium, pour une croissance de graphène par dépôt chimique en phase vapeur
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