Electron Transport and Hot Phonons in Carbon Nanotubes

Details Electron Transport and Hot Phonons in Carbon Nanotubes Electron Transport and Hot Phonons in Carbon Nanotubes

2005-03-11

arxiv.org/abs/cond-mat/0503278v2

Phys. Rev. Lett. 95, 236802 (2005)

Physics

Condensed Matter

Materials Science

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.95.236802

We demonstrate the key role of phonon occupation in limiting the high-field ballistic transport in metallic carbon nanotubes. In particular, we provide a simple analytic formula for the electron transport scattering length, that we validate by accurate first principles calculations on (6,6) and (11,11) nanotubes. The comparison of our results with the scattering lengths fitted from experimental I-V curves indicates the presence of a non-equilibrium optical phonon heating induced by electron transport. We predict an effective temperature for optical phonons of thousands Kelvin.

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