Abstract
The nature of low-temperature conductivity for stretch oriented perchlorate doped polyacetylene (PA) films is considered. It is concluded that the conductivity behavior is, in particular, related to a strong inelastic electron scattering by low-energy vibrational excitations which becomes important due to the influence of glassy properties on the polymer structure. The observed negative magnetoresistance (MR) is attributed to weak localization, which at higher temperature is suppressed by a strong inelastic scattering of electrons by low-energy vibrational excitations typical for glasses. The possible influence of inelastic scattering by lattice vibrations typical for clean metals or by quasilocal harmonic vibrations typical for glasses on the metallic conductivity at higher temperature is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 197-202 |
| Number of pages | 6 |
| Journal | Physica B: Condensed Matter |
| Volume | 305 |
| Issue number | 3-4 |
| DOIs | |
| State | Published - Nov 2001 |
Bibliographical note
Funding Information:We thank V.I. Kozub for reading the manuscript and for stimulating discussions. This work was supported by KISTEP under the contract no. 98-I-01-04-A-026, Ministry of Science and Technology (MOST), Korea. Partial support for A.N.A. is from the BK-21 Program of the Ministry of Education (MOE), Korea.
Keywords
- Conducting polymers
- Conductivity
- Magnetoresistance
- Soft potential model