Transport in coupled graphene-nanotube quantum devices

Details Transport in coupled graphene-nanotube quantum devices Transport in coupled graphene-nanotube quantum devices

2012-04-06

arxiv.org/abs/1204.1474v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report quantum transport measurements on carbon nanotube quantum dot devices with graphene charge detectors and a nanotube contacted by graphene source and drain leads. Individual charging events in the nanotube quantum dot lead to conduction changes of up to 20% in the graphene nanoribbon acting as a charge detector. In a graphene-contacted nanotube device we observe Coulomb blockade leading to the conclusion that tunneling barriers with rates in the low GHz regime are present at the graphene carbon nanotube interfaces.

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