Infrared activity of Peierls systems and application to polyacetylene

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The conductivity of added charge (e.g. solitons) to a dimerized Peierls condensate with N coupled phonon bands is considered. If the phonon frequencies are low compared with the Peierls gap and the charge extends over several atoms then: (a) The infra-red frequencies Ωφn(n = 1, 2, ..., N) and their relative weights are independent of the charge configuration. (b) The product ΠNn=1(ΩφnRn), where ΩRn are the Raman frequencies, is isotope independent. The results are valid even if electron-electron interactions are present and a pinning effect is included. The product rule (b) is in good agreement with data on trans (CH)x and (CD)x. This data also yields the coupling constants and the pinning force.

Original languageEnglish
Pages (from-to)729-734
Number of pages6
JournalSolid State Communications
Issue number10
StatePublished - 1 Jan 1982
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)
  • Condensed Matter Physics
  • Materials Chemistry


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