Puzzling results explained: A multiband approach to Coulomb drag and indirect excitons

(ARC Centre of Excellence in Future Low-Energy Electronics Technologies) A new theoretical study explains previous mystifying experimental results, in which coupled charged particles moved in exactly the opposite direction to that predicted.This apparently contradictory phenomenon is associated with the bandgap in dual-layer graphene structures, a bandgap which is very much smaller than in conventional semiconductors.

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