Scaling of Resistance and Electron Mean Free Path of Single-Walled Carbon Nanotubes

Details Scaling of Resistance and Electron Mean Free Path of Single-Walled Carbon Nanotubes Scaling of Resistance and Electron Mean Free Path of Single-Walled Carbon Nanotubes

2007-04-03

arxiv.org/abs/0704.0300v2

Phys. Rev. Lett, 98, 186808 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages 4 figures, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.98.186808

We present an experimental investigation on the scaling of resistance in individual single walled carbon nanotube devices with channel lengths that vary four orders of magnitude on the same sample. The electron mean free path is obtained from the linear scaling of resistance with length at various temperatures. The low temperature mean free path is determined by impurity scattering, while at high temperature the mean free path decreases with increasing temperature, indicating that it is limited by electron-phonon scattering. An unusually long mean free path at room temperature has been experimentally confirmed. Exponentially increasing resistance with length at extremely long length scales suggests anomalous localization effects.

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