ESR studies of AuCl3 doped polyacetylene: Metallic behaviour at low temperatures

Citation
A. Bartl et al., ESR studies of AuCl3 doped polyacetylene: Metallic behaviour at low temperatures, SYNTH METAL, 101(1-3), 1999, pp. 465-466
Citations number
4
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
101
Issue
1-3
Year of publication
1999
Pages
465 - 466
Database
ISI
SICI code
0379-6779(199905)101:1-3<465:ESOADP>2.0.ZU;2-K
Abstract
Doped polyacetylene (PA) samples stored under vacuum at room temperature in ESR sample tubes reach after three months nearly a steady state in the tem perature dependent intensity and linewidth behaviour. The ESR spectra show two lines with an equal g-factor. In particular the linewidth of the small line demonstrates a remarkable property. The temperature dependence of the linewidth indicates a maximum at 30 K, and has a value of about 0.17 mT abo ve this temperature in the whole investigated region up to 300 K. The ESR d ata are dicussed in a two spin model of delocalized states at the PA chain and fixed spins in the dopants. The interpretation underlines the metallic behaviour of the doped PA at low temperatures.