Semiclassical formalism of optical absorption and breathers in polyacetylene

B. Horovitz, A. R. Bishop, S. R. Phillpot

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A formalism for the optical absorption in a coupled electron-ion system is developed. The formalism assumes an initial trajectory with frequency much lower than electronic energy scales, and a short-memory condition, i.e., the excited-state trajectories diverge away from the initial trajectory within one period. The result shows nonadiabatic features such as level broadening, sidebands, and tails in nonclassical regimes. We apply the formalism to breather modes in polyacetylene and show that they can account for the intragap absorption tail and for the observed photoinduced absorption at 1.35 eV.

Original languageEnglish
Pages (from-to)2210-2213
Number of pages4
JournalPhysical Review Letters
Issue number21
StatePublished - 1 Jan 1988

ASJC Scopus subject areas

  • General Physics and Astronomy


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