Coulomb blockade effects in multiwall carbon nanotubes
Abstract
We have investigated the electron transport properties of multiwall carbon nanotubes including their temperature dependence of resistivity, magnetoresistance, differential resistance dI/dV, and thermoelectric power. At low temperatures we found that the resistance of the samples enters into a hopping regime with the opening of a Coulomb gap, the dI/dV curves show a zero-bias suppression, the thermoelectric power follows a logarithmic temperature dependence, and that the MR data show a scaling law with scaling fields characterized by the hopping length of the electrons. All these phenomena can be consistently understood by assuming the existence of a Coulomb gap and the happening of Coulomb blockade at low temperatures.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2003
- Bibcode:
- 2003APS..MARS26006L