Quantum interference is observed in a graphene ring system via the Aharonov Bohm effect. As graphene is a gapless semiconductor, this geometry allows to study the unique situation of quantum interference between electrons and holes in addition to the unipolar quantum interference. The period and amplitude of the observed Aharonov-Bohm oscillations are independent of the sign of the applied gate voltage showing the equivalence between unipolar and dipolar interference.

Topics
Graphene, Aharonov-Bohm effect, Quantum interference, Semiconductors
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© 2013 AIP Publishing LLC.
2013
AIP Publishing LLC
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