Conductance of metallic carbon nanotubes dipped into a metal

Details Conductance of metallic carbon nanotubes dipped into a metal Conductance of metallic carbon nanotubes dipped into a metal

2001-10-11

arxiv.org/abs/cond-mat/0110218v1

Physics

Condensed Matter

Accepted in Phys. Rev. B rapid commun.; 5 pages, 4 figs

Scientific paper

10.1103/PhysRevB.64.201401

We calculate the conductance variation of several metallic carbon nanotubes as their end is being dipped into a liquid metal electrode, where experiments have shown an achievable conductance close to 1 quantum of conductance. The calculated conductance for a (40,40) nanotube indicates that the current flows almost entirely through the pi mode, and not the pi* mode. The calculation also predicts that for narrower nanotubes (~1 nm in diameter), in a 'weak coupling' regime, the saturation of both pi and pi* modes should be observable. An experiment is proposed to verify this point.

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