Coulomb Impurity Centres and the Impurity Absorption Spectra in the Doped Polyacetylene
1990; Institute of Physics; Volume: 11; Issue: 2 Linguagem: Inglês
10.1209/0295-5075/11/2/009
ISSN1286-4854
Autores Tópico(s)Photoreceptor and optogenetics research
ResumoPolyacetylene is regarded as a 3D system of long finite (CH)l fragments. The packing of the polymer chains being dense, the interfragment resonance coupling is considerably strong. A model of Coulomb impurity centre, which appears in polyacetylene upon doping, is proposed. The electronic structure of the impurity centre is calculated and its dimensions are estimated. These provide a new explanation for the near-infrared absorption band and for the absence of additional paramagnetism in the doped polyacetylene.
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