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Contact resistance of quantum tubes |
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| Authors: | Niels Asger Mortensen Kristinn Johnsen Antti-Pekka Jauho Karsten Flensberg |
| Institution: | a Mikroelektronik Centret, Technical University of Denmark, Ørsteds Plads, Bld. 345 east, DK-2800 Kgs. Lyngby, Denmark;b Nordic Institute for Theoretical Physics, Blegdamsvej 17, DK-2100, Copenhagen, Denmark Ø;;c Ørsted Laboratory, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen Ø, Denmark |
| Abstract: | We consider the conductance of a quantum tube connected to a metallic contact. The number of angular momentum states that the tube can support depends on the strength of the radial confinement. We calculate the transmission coefficients which yield the conductance via the Landauer formula, and discuss the relation of our results to armchair carbon nanotubes embedded in a metal. For Al and Au contacts and tubes with a realistic radial confinement we find that the transmission can be close to unity corresponding to a contact resistance close to h / 2 e2per band at the Fermi level in the carbon nanotube. |
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