Abstract
In this paper we present a quantitative theory of the insulator-metal transition in the conducting polymer polyaniline. We begin by focusing on a theory for conduction in single strands of the polymer. To this end, we introduce the random dimer model and show that this model is capable of explaining the origin of extended states in single strands of polyaniline. We then formulate a more global theory for the conductivity within a granular-rod model. We show how quantitative results can be obtained for 1) the temperature dependence of the conductivity σ = σ0exp[-(T0/T) 1/2 ], 2) the doping dependence of T0, 3) the anomalous 1/T dependence of the thermoelectric power, as well as 4) the linear increase of the Pauli susceptibility with dopant concentration.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4697-4703 |
| Number of pages | 7 |
| Journal | Synthetic Metals |
| Volume | 57 |
| Issue number | 2 -3 pt 6 |
| State | Published - Jan 1 1993 |
| Externally published | Yes |
| Event | Proceedings of the International Conferece on Science and Technology of Synthetic Metals - Goteborg, Swed Duration: Aug 12 1992 → Aug 18 1992 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry