Carbon nanoelectronics: unzipping tubes into graphene ribbons

Details Carbon nanoelectronics: unzipping tubes into graphene ribbons Carbon nanoelectronics: unzipping tubes into graphene ribbons

2009-04-23

arxiv.org/abs/0904.3676v1

Phys.Rev.Lett. 103, 086801 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures included

Scientific paper

We report on the transport properties of novel carbon nanostructures made of partially unzipped carbon nanotubes, which can be regarded as a seamless junction of a tube and a nanoribbon. We find that graphene nanoribbons act at certain energy ranges as a perfect valley filters for carbon nanotubes, with the maximum possible conductance. Our results show that a partially unzipped carbon nanotube is a magnetoresistive device, with a very large value of the magnetoresistance. We explore the properties of several structures combining nanotubes and graphene nanoribbons, demonstrating that they behave as optimal contacts for each other, and opening a new route for the design of mixed graphene/nanotube devices.

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