Abstract
We suggest that conduction in carbon nanotube ropes or mats is best understood in terms of a heterogeneous model, involving regions of metallic conduction together with hopping or tunnelling through small electrical barriers corresponding to defects of various types. Such a model gives a good account of the measured resistivity, in particular the crossover from nonmetallic to metallic sign for the resistivity temperature dependence seen in many samples, in analogy to our similar model for conducting polymers. In agreement with this model, the thermopower has been observed to be more metal-like than resistivity, but does show pronounced nonlinearities as a function of temperature. We investigate electron-phonon effects, density of states peaks, and semiconductor contributions as possible causes of these nonlinearities.
| Original language | English |
|---|---|
| Pages (from-to) | 2547-2550 |
| Number of pages | 4 |
| Journal | Synthetic Metals |
| Volume | 103 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 1999 Jun 24 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Polymers and Plastics
Cite this
Electronic transport in carbon nanotube ropes and mats. / Kaiser, A. B.; Park, Y. W.; Kim, Gyu-Tae; Choi, E. S.; Düsberg, G.; Roth, S.
In: Synthetic Metals, Vol. 103, No. 1-3, 24.06.1999, p. 2547-2550.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electronic transport in carbon nanotube ropes and mats
AU - Kaiser, A. B.
AU - Park, Y. W.
AU - Kim, Gyu-Tae
AU - Choi, E. S.
AU - Düsberg, G.
AU - Roth, S.
PY - 1999/6/24
Y1 - 1999/6/24
N2 - We suggest that conduction in carbon nanotube ropes or mats is best understood in terms of a heterogeneous model, involving regions of metallic conduction together with hopping or tunnelling through small electrical barriers corresponding to defects of various types. Such a model gives a good account of the measured resistivity, in particular the crossover from nonmetallic to metallic sign for the resistivity temperature dependence seen in many samples, in analogy to our similar model for conducting polymers. In agreement with this model, the thermopower has been observed to be more metal-like than resistivity, but does show pronounced nonlinearities as a function of temperature. We investigate electron-phonon effects, density of states peaks, and semiconductor contributions as possible causes of these nonlinearities.
AB - We suggest that conduction in carbon nanotube ropes or mats is best understood in terms of a heterogeneous model, involving regions of metallic conduction together with hopping or tunnelling through small electrical barriers corresponding to defects of various types. Such a model gives a good account of the measured resistivity, in particular the crossover from nonmetallic to metallic sign for the resistivity temperature dependence seen in many samples, in analogy to our similar model for conducting polymers. In agreement with this model, the thermopower has been observed to be more metal-like than resistivity, but does show pronounced nonlinearities as a function of temperature. We investigate electron-phonon effects, density of states peaks, and semiconductor contributions as possible causes of these nonlinearities.
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UR - http://www.scopus.com/inward/citedby.url?scp=0033138002&partnerID=8YFLogxK
U2 - 10.1016/S0379-6779(98)00222-7
DO - 10.1016/S0379-6779(98)00222-7
M3 - Article
AN - SCOPUS:0033138002
VL - 103
SP - 2547
EP - 2550
JO - Synthetic Metals
JF - Synthetic Metals
SN - 0379-6779
IS - 1-3
ER -