Quantum transport in a multiwalled carbon nanotube
L. Langer, V. Bayot, E. Grivei, J.-P. Issi, J.P. Heremans, C.H. Olk,, L. Stockman, C. Van Haesendonck, Y. Bruynseraede
TL;DR
This study investigates electrical resistance in a single multiwalled carbon nanotube at millikelvin temperatures, revealing quantum interference effects like weak localization and conductance fluctuations influenced by magnetic fields.
Contribution
It provides experimental evidence of quantum transport phenomena in multiwalled carbon nanotubes, interpreting results through mesoscopic physics concepts.
Findings
Resistance shows ln T dependence and saturates at low T
Magnetic field increases conductance and causes fluctuations
Data consistent with weak localization and conductance fluctuations
Abstract
We report on electrical resistance measurements of an individual carbon nanotube down to a temperature T=20 mK. The conductance exhibits a ln T dependence and saturates at low temperature. A magnetic field applied perpendicular to the tube axis, increases the conductance and produces aperiodic fluctuations. The data find a global and coherent interpretation in terms of two-dimensional weak localization and universal conductance fluctuations in mesoscopic conductors. The dimensionality of the electronic system is discussed in terms of the peculiar structure of carbon nanotubes.
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