On the temperature dependence of electrical conductivity of buckytube-containing carbonaceous samples

We have examined the electrical conductivity, σ(T), from 4.2 to 295 K of samples from a series of buckytube-containing carbonaceous deposits prepared under helium pressures ranging from 20 to 750 Torr. The results show that while absolute values of conductivity are very sample dependent, all tempera...

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Bibliographic Details
Published in:Solid state communications 1994-03, Vol.89 (12), p.989-994
Main Authors: Heyd, R., Charlier, A., Marêché, J.F., McRae, E., Zharikov, O.V.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity phenomena in semiconductors and insulators
Electronic transport in condensed matter
Exact sciences and technology
Physics
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Summary:We have examined the electrical conductivity, σ(T), from 4.2 to 295 K of samples from a series of buckytube-containing carbonaceous deposits prepared under helium pressures ranging from 20 to 750 Torr. The results show that while absolute values of conductivity are very sample dependent, all temperature variations can be expressed as σ(T) = C exp(AT) where C and A are positive coefficients. We discuss the results in the light of thermally activated tunnelling based on a two level model.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(94)90500-2