Dimers and rods in the conducting state of polyaniline

Qiming Li, Luis Cruz, Philip Phillips

Research output: Contribution to journalConference articlepeer-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 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 languageEnglish (US)
Pages (from-to)4697-4703
Number of pages7
JournalSynthetic Metals
Issue number2 -3 pt 6
StatePublished - Jan 1 1993
Externally publishedYes
EventProceedings of the International Conferece on Science and Technology of Synthetic Metals - Goteborg, Swed
Duration: Aug 12 1992Aug 18 1992

ASJC Scopus subject areas

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


Dive into the research topics of 'Dimers and rods in the conducting state of polyaniline'. Together they form a unique fingerprint.

Cite this