Abstract
The magnetic and transport properties of polyacetylene electrochemically oxidized in the presence of perchlorate ion have been determined. Room temperature dc conductivity is unaffected by doping between . A rapid conductivity increase occurs with increasing dopant level having a midpoint of transition at . By comparison, the change in thermopower vs. is sharper taking place within a tenfold increase in with a midpoint at . The unparied spin concentrations remain constant as dopant concentration increases before the onset of a Dysonian lineshape at . The results are interpreted as the melting of a glassy carrier state causing the sharp change of transport properties. A phase separation into metallic domains occurs at . Side reactions involving the electrolyte complicate the electrochemistry of polyacetylene.
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