Abstract
Temperture dependence of reflection spectra of iodine doped polyacetylene have been studied at 298 K and 10 K for wide spectral range. The spectra showed remarkable change at low temperature indicating that the mid gap band is increased while the band due to the free carrier is diminished. The change of the spectra is explained by the increase of the charged soliton structure or the bond alternation at low temperature. The result is consistent with the temperature dependence of electrical conductivity of doped polyacetylene.
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