ON THE TEMPERATURE-DEPENDENCE OF ELECTRICAL-CONDUCTIVITY OF BUCKYTUBE-CONTAINING CARBONACEOUS SAMPLES

Authors
HEYD R CHARLIER A MARECHE JF MCRAE E ZHARIKOV OV
Citation
R. Heyd et al., ON THE TEMPERATURE-DEPENDENCE OF ELECTRICAL-CONDUCTIVITY OF BUCKYTUBE-CONTAINING CARBONACEOUS SAMPLES, Solid state communications, 89(12), 1994, pp. 989-994
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
89
Issue
12
Year of publication
1994
Pages
989 - 994
Database
ISI
SICI code
0038-1098(1994)89:12<989:OTTOEO>2.0.ZU;2-Z
Abstract
We have examined the electrical conductivity, sigma(T), from 4.2 to 29 5 K of samples from a series of buckytube-containing carbonaceous depo sits prepared under helium pressures ranging from 20 to 750 Torr. The results show that while absolute values of conductivity are very sampl e dependent, all temperature variations can be expressed as sigma(T) = C exp(AT) where C and A are positive coefficients. We discuss the res ults in the light of thermally activated tunnelling based on a two lev el model.