Electroconductance in single-wall carbon nanotubes

Jaiswal, Manu; Sangeeth, C. S. Suchand; Menon, Reghu
July 2009
Applied Physics Letters;7/20/2009, Vol. 95 Issue 3, p032111
Academic Journal
A comparative study of the electric-field induced hopping transport probes the effective dimensionality (D) in bulk and ultrathin films of single-wall carbon nanotubes (SWNTs). The values of the scaling function exponents for the electroconductance are found to be consistent with that in three-dimensional and two-dimensional systems. The significant difference in threshold voltage in these two types of SWNTs is a consequence of the variation in the number of energetically favorable sites available for charge carriers to hop by using the energy from the field. Furthermore, a modification to the magnetotransport is observed under high electric-fields.


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