Numerical calculations were made of the conductance characteristics of a uniform (10,10) carbon nanotube in the presence of an applied bias. It was shown that, for long tubes, the conduction mechanism involved only the four non-degenerate sub-bands when the applied bias fell slowly across the tube. The focus of the work was to calculate the transmission coefficient and low bias conductance of carbon nanotubes with defects. The calculations showed that a weak uniform disorder in the tube did not cause a significant change in the zero bias conductance. Substitutional defects which were strong scatterers could cause a gap in the transmission coefficient versus energy at the middle of the band, resulting in a significant change in the low-bias conductance.

Transport in (10,10) Carbon Nanotubes with Defects. M.P.Anantram, J.Han, T.R.Govindan: Annals of the New York Academy of Sciences, 1998, 852, 169-77