Electronic Correlation Effects in Cyclic Polyenes and in Polyacetylene

  • Peter Horsch
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 38)


Most papers written nowadays on polyacetylene [1,2] seem to accept as a well-established fact that the origin of the optical gap in trans-(CH)x is due to bond alternation arising from the Peierls instability. Yet a completely different explanation for the origin of the optical gap has been given by OVCHINNIKOV and coworkers [3], who suggested that the gap results from electronic correlations and not from bond alternation. Estimating the relevant physical parameters for polyacetylene from substances such as ethane, benzene, ethylene and graphite [4], they concluded that the electron-phonon coupling is much too small to produce a bond alternation large enough to explain the measured gap.


Correlation Energy Electronic Correlation Effect Bond Alternation Stretch Force Constant Hubbard Interaction 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1981

Authors and Affiliations

  • Peter Horsch
    • 1
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgart 80Fed. Rep. of Germany

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