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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Thursday, 01 April 2004
(at 10:00 in room Phy 4.1.13)
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Parallel and perpendicular magnetoresistance of multiwall carbon nanotubes

Bernhard Stojetz

Institut für Experimentelle und Angewandte Physik
Universität Regensburg

We report resistance measurements for single multiwall carbon nanotubes in magnetic fields both parallel and perpendicular to the tube axis. The tubes were trapped onto pre-patterned Al gate electrodes by means of an ac electric field. The strong electrostatic coupling of the nanotube to the gate allows a considerable variation of the doping level of the tube. Magnetoresistance traces were measured for many values of the gate voltage, which allows an ensemble averaging of the conductance fluctuations induced by quantum interference. The ensemble averaging reduces the conductance fluctuations while leaving the weak localization contribution to the resistance unchanged. The data can be consistently interpreted in terms of quantum transport in presence of weak disorder.

last modified: 2021.05.05 Wed
author: webadmin