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Charge transport in transparent single-wall carbon nanotube networks

Jaiswal, Manu and Wang, Wei and Fernando, Shiral KA and Sun, Ya-Ping and Menon, Reghu (2007) Charge transport in transparent single-wall carbon nanotube networks. In: Journal of Physics: Condensed Matter, 19 (44). 446006-1-446006-8.

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We report the electric-field effects and magnetotransport in transparent networks of single-wall carbon nanotubes(SWNT). The temperature dependence of conductance of the network indicates a 2D Mott variable-range hopping (VRH) transport mechanism. Electric field and temperature are shown to have similar effects on the carrier hops and identical exponents for the conductance of the network are obtained from the high electric field and temperature dependences. A power-law temperature dependence with an exponent 3/2 for the threshold field is obtained and explained as a result of the competing contributions from electric field and phonons to the carrier hop. A negative magnetoresistance (MR) is observed at low temperatures, which arises from a forward interference scattering mechanism in the weak scattering limit, consistent with the VRH transport.

Item Type: Journal Article
Publication: Journal of Physics: Condensed Matter
Publisher: Institute of Physics
Additional Information: Copyright of this article belongs to Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 16 Jul 2008
Last Modified: 19 Sep 2010 04:47
URI: http://eprints.iisc.ac.in/id/eprint/14977

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