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Magnetotransport in transparent single-wall carbon nanotube networks

Jaiswal, Manu and Wang, Wei and Fernando, KA Shiral and Sun, Ya-Ping and Menon, Reghu (2007) Magnetotransport in transparent single-wall carbon nanotube networks. In: Physical Review B, 76 (11). 113401:1-4.

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An experimental study of the low temperature magnetotransport in optically transparent single-wall carbon nanotube (SWNT) networks is reported. The SWNT network shows Coulomb gap variable-range hopping conduction at low temperatures. The magnetoresistance (MR) involves the interplay of two phenomena: a forward interference process leading to negative MR together with shrinkage of electronic wave function contributing to the positive MR. These two mechanisms fit the low-field data. The analysis of magnetotransport data gives an estimate for intrinsic parameters including localization length and Coulomb gap. The temperature dependence of the forward interference mechanism is shown to follow an inverse power-law dependence with an exponent close to 1, indicating the weak scattering process involved in the transport.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: Copyright of this article belongs to American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 05 Nov 2007
Last Modified: 19 Sep 2010 04:41
URI: http://eprints.iisc.ac.in/id/eprint/12428

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