Contact resistance of quantum tubes

Details Contact resistance of quantum tubes Contact resistance of quantum tubes

1999-07-02

arxiv.org/abs/cond-mat/9907026v2

Superlattices and Microstructures 26, 351 (1999).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages including 5 figures. Accepted for publication in Superlattices and Microstructures. (stylefile included)

Scientific paper

10.1006/spmi.1999.0812

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. We relate 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/2e^2 per band at the Fermi level in the carbon nanotube.

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