ELECTRON LOCALIZATION EFFECTS ON THE CONDUCTING STATE IN POLYANILINE

Citation
Pk. Kahol et al., ELECTRON LOCALIZATION EFFECTS ON THE CONDUCTING STATE IN POLYANILINE, Journal of physics. Condensed matter, 6(29), 1994, pp. 5631-5638
Citations number
25
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
09538984
Volume
6
Issue
29
Year of publication
1994
Pages
5631 - 5638
Database
ISI
SICI code
0953-8984(1994)6:29<5631:ELEOTC>2.0.ZU;2-G
Abstract
Electron localization effects in polyaniline have been investigated th rough the dependence of DC conductivity and magnetic susceptibility on thermal aging. A dramatic effect of thermal aging on conductivity is reported in the insulator-to-metal transition region, which is interpr eted as due to the onset of structural order between the chains. This is argued to confirm that the insulator-to-metal transition correspond s to a crossover of the electron states from localization to delocaliz ation. Furthermore, the quasi-one-dimensional variable-range hopping m odel is shown to account for the observed temperature dependences of t he conductivity in the entire protonation range.