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arXiv · 0804.3997

High-field Current-carrying Capacity of Semiconducting Carbon Nanotubes

Debdeep Jena
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Abstract

It is shown that current saturation in semiconducting carbon nanotubes is indistinguishable from metallic nanotubes if the carrier density is above a critical value determined by the bandgap and the LO phonon energy. This feature stems from the higher number of current-carrying states in the semiconducting tubes due to the van-Hove singularity at the band-edge. Above this critical carrier density, the ensemble saturation velocity at high-fields is found to be independent of the bandgap, but strongly dependent on the carrier density, explaining recent observations.

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Debdeep Jena. 2008-06-08. High-field Current-carrying Capacity of Semiconducting Carbon Nanotubes. https://arxiv.org/abs/0804.3997

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