Forskning ved Københavns Universitet - Københavns Universitet


Contact resistance of quantum tubes

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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/2e2 per band at the Fermi level in the carbon nanotube.

TidsskriftSuperlattices and Microstructures
Udgave nummer6
Sider (fra-til)351-361
Antal sider11
StatusUdgivet - 1 jan. 1999

ID: 199596058