Applied Physics A

, Volume 74, Issue 3, pp 363–365

Multiwalled carbon nanotubes are ballistic conductors at room temperature

Authors

  • C. Berger
    • Georgia Institute of Technology, School of Physics, Atlanta GA 30332, USA
  • Y. Yi
    • Georgia Institute of Technology, School of Physics, Atlanta GA 30332, USA
  • Z.L. Wang
    • Georgia Institute of Technology, School of Physics, Atlanta GA 30332, USA
  • W.A. de Heer
    • Georgia Institute of Technology, School of Physics, Atlanta GA 30332, USA

DOI: 10.1007/s003390201279

Cite this article as:
Berger, C., Yi, Y., Wang, Z. et al. Appl Phys A (2002) 74: 363. doi:10.1007/s003390201279

Abstract.

Following the experiments of Frank et al. [1], which demonstrated quantum transport in multiwalled carbon nanotubes, there have been several experiments that appear to contradict the main conclusion of that paper, which is that the transport of a MWNT at room temperature is ballistic. Here we demonstrate that the intrinsic resistance of clean-arc-produced carbon nanotubes is at most 200 Ω/ μm, which implies that the momentum mean free path is greater than 30 μm, which in turn is much larger than the tube length. This implies that these tubes are ballistic, according to the standard definition of ballistic transport. We also show that the contact resistance with mercury is quite large: a nanotube in contact with Hg over 100 nm of its length still represents a 3000 Ω resistance.

PACS: 73.22.-f; 72.15.Lh; 73.63.Fg

Copyright information

© Springer-Verlag 2002