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Phys. Rev. B 64, 125407 (2001) [7 pages]

Temperature dependence of the conductance of multiwalled carbon nanotubes

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E. Graugnard*
Department of Physics, Purdue University, W. Lafayette, Indiana 47907

P. J. de Pablo
Department Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049-Madrid, Spain

B. Walsh†, A. W. Ghosh, and S. Datta
Department of Electrical and Computer Engineering, Purdue University, W. Lafayette, Indiana 47907

R. Reifenberger
Department of Physics, Purdue University, W. Lafayette, Indiana 47907

Received 14 December 2000; published 10 September 2001

We report on the conductance of multiwalled carbon nanotubes as a function of voltage and temperature between room temperature and 4.2 K. The data show a monotonic decrease in conductance as the temperature is lowered. At temperatures below about 20 K, a nonlinearity develops in the V(I) data, corresponding to a pronounced dip in the conductance near zero bias. The size of the dip increases as the temperature is lowered. The data are explained in terms of transport through a Luttinger liquid. The measured conductance contains contributions from the nanotube-contact interface and from the nanotube itself.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.125407
DOI:
10.1103/PhysRevB.64.125407
PACS:
73.63.Fg, 73.22.-f

*Present address: Department of Materials Science & Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801. Electronic address: elton@uiuc.edu

†Present address: IBM / Dept. 44NA, 2070 Route 52, Hopwell Jct., NY 12533.

 
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