A new twisted graphene system hosts chargeless valley current

In a recent study, the Nanoelectronics lab in TIFR has found a novel route to generate and detect a chargeless valley current. Valleys represent energetically degenerate but structurally distinguishable points in the band structure of a material. Whenever electrons associated with a particular valley quantum number flow, it gives rise to a dissipationless valley current where the net electronic charge transferred is zero--this can potentially be used as robust channels of information carriers.

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