Stephan Engels, Peter Weber, Bernat Terrés, Jan Dauber, Carola Meyer, Christian Volk, Stefan Trellenkamp, Uwe Wichmann, Christoph Stampfer
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.
View original:
http://arxiv.org/abs/1204.1474
No comments:
Post a Comment