Spectroscopy of Photo-Induced Solitons in cis-rich and trans-Polyacetylene

  • N. Colaneri
  • R. H. Friend
  • H. E. Schaffer
  • A. J. Heeger
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 76)

Abstract

We present detailed measurements of the vibrational and electronic transitions of photogenerated solitons in cis-rich and all-trans polyacetylene prepared by the Shirakawa method. We find that the saturation concentration of excitations on the trans sequences in cis-rich material (30% trans) can be substantially higher than in all-trans and consider that these long-lived states are pairs of like-charged solitons. For both this cis-rich material and also for all-trans we find that photoinduced bleaching occurs only above the band edge, as expected if the photogenerated soliton states are formed from band states. In addition to the ‘translational’ IR modes previously reported, we find weaker absorptions from the shape modes of the soliton. These are present in both cis-rich and all-trans polyacetylene, and we consider that we have observed the IR-active ‘third bound mode’ calculated by WADA and colleagues.

Keywords

Recombination Soliton Acetylene Thiophene Maki 

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References

  1. 1.
    W. P. Su, J. R. Schrieffer and A. J. Heeger: Phys. Rev. Lett. 42, 1698 (1979); Phys. Rev. B22, 2099 (1980); Err. B28, 1138 (1983).CrossRefGoogle Scholar
  2. 2.
    Handbook of Conducting Polymers: ed. by T. J. Skotheim (Marcel Dekker, New York 1986).Google Scholar
  3. 3.
    G. B. Blanchet, C. R. Fincher, T-C Chung and A. J. Heeger: Phys. Rev. Lett. 50, 1938 (1983).CrossRefGoogle Scholar
  4. 4.
    H. E. Schaffer, R. H. Friend and A. J. Heeger: preprint.Google Scholar
  5. 5.
    Z. Vardeny, J. Orenstein and G. L. Baker: Phys. Rev. Lett. 50, 2032 (1983).CrossRefGoogle Scholar
  6. 6.
    J. Orenstein, G. L. Baker and Z. Vardeny: J. Phys. (Paris) 44, C3, 407 (1983).CrossRefGoogle Scholar
  7. 7.
    J. Orenstein, Z. Vardeny, G. L. Baker, G. Eagle and S. Etemad: Phys. Rev. B30, 786 (1984).Google Scholar
  8. 8.
    Z. Vardeny, and J. Tauc: Phys. Rev. Lett. 54, 1844 (1985).CrossRefGoogle Scholar
  9. 9.
    B. Horovitz: Solid State Commun. 41, 729 (1980).CrossRefGoogle Scholar
  10. 10.
    Z. Vardeny, E. Ehrenfreund, O. Brafman and B. Horovitz: Phys. Rev. Lett. 51, 2326 (1983). H.H. Ito, A. Terai, Y. Ono and Y. Wada: J. Phys. Soc. Japan 53, 3519 (1984).CrossRefGoogle Scholar
  11. 12.
    H. Ito and Y. Ono: J. Phys. Soc. Japan 54, 1194 (1985).CrossRefGoogle Scholar
  12. 13.
    A. Terai, H. Ito, Y. Ono and Y. Wada: J. Phys. Soc. Japan 54, 4468 (1984).Google Scholar
  13. 14.
    A. Terai and Y. Ono: J. Phys. Soc. Japan 55, 213 (1986).CrossRefGoogle Scholar
  14. 15.
    A. Terai, Y. Ono and Y. Wada: J. Phys. Soc. Japan 55, 2889 (1986).CrossRefGoogle Scholar
  15. 16.
    M. Nakahara and K. Maki: Phys. Rev. B25, 7789 (1982).Google Scholar
  16. 17.
    Z. Vardeny, E. Ehrenfreund, O. Brafman, B. Horovitz, H. Fujimoto, J. Tanaka and M. Tanaka: Phys. Rev. Lett. 57, 2995 (1986).CrossRefGoogle Scholar
  17. 18.
    L. Rothberg, T. M. Jedhu, S. Etemad and G. L. Baker: Phys. Rev. Lett. 49, 3229 (1986).CrossRefGoogle Scholar
  18. 19.
    P. D. Townsend and R. H. Friend: Synthetic Metals 17, 361 (1987).CrossRefGoogle Scholar
  19. 20.
    F. Moraes, Y. W. Park and A. J. Heeger: Synthetic Metals 13, 113 (1986).CrossRefGoogle Scholar
  20. 21.
    C. G. Levey, D. V. Lang, S. Etemad, G. L. Baker and J. Orenstein: Synthetic Metals 17, 569 (1987).CrossRefGoogle Scholar
  21. 22.
    Z. Vardeny, E. Ehrenfreund and O. Brafman: Synthetic metals 17, 349 (1987).CrossRefGoogle Scholar
  22. 23.
    J. Orenstein: ref. 2, page 1297.Google Scholar
  23. 24.
    Z. Vardeny, E. Ehrenfreund, O. Brafman, M. Nowak, H. E. Schaffer, A. J. Heeger and F. Wudl: Phys. Rev. Lett. 56, 671 (1986).CrossRefGoogle Scholar
  24. 25.
    D. D. C. Bradley, R. H. Friend and W. J. Feast: Synthetic Metals 17, 645 (1987).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • N. Colaneri
    • 1
  • R. H. Friend
    • 2
  • H. E. Schaffer
    • 1
  • A. J. Heeger
    • 1
  1. 1.Department of Physics and Institute for Polymers and Organic SolidsUniversity of CaliforniaSanta BarbaraUSA
  2. 2.Cavendish LaboratoryCambridgeUK

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