Localized and Delocalized Charge Transport in Single-Wall Carbon-Nanotube Mats

Details Localized and Delocalized Charge Transport in Single-Wall Carbon-Nanotube Mats Localized and Delocalized Charge Transport in Single-Wall Carbon-Nanotube Mats

2000-01-17

arxiv.org/abs/cond-mat/0001222v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages including 4 figures

Scientific paper

10.1103/PhysRevB.61.R5129

We measured the complex dielectric constant in mats of single-wall carbon-nanotubes between 2.7 K and 300 K up to 0.5 THz. The data are well understood in a Drude approach with a negligible temperature dependence of the plasma frequency (omega_p) and scattering time (tau) with an additional contribution of localized charges. The dielectric properties resemble those of the best ''metallic'' polypyrroles and polyanilines. The absence of metallic islands makes the mats a relevant piece in the puzzle of the interpretation of tau and omega_p in these polymers.

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