Dimer and rods in the conducting state of polyaniline

Qiming LI, Luis Cruz, Philip Phillips

Research output: Contribution to journalArticlepeer-review


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 polyailine. 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 susceptibity with dopant concentration.

Original languageEnglish (US)
Pages (from-to)4697-4703
Number of pages7
JournalSynthetic Metals
Issue number2-3
StatePublished - Apr 19 1993
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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