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The current-voltage (I-V) characteristics of individual nanofibres of lightly-doped polyacetylene show very strong nonlinearities. At low temperatures the I-V characteristics are consistent with Zener-type tunnelling, and independent of temperature and magnetic field. We propose that this behaviour arises from tunnelling of a segment of the conjugated bond system in the presence of an electric field,...
The current-voltage (I-V) characteristics of individual nanofibres of doped polyacetylene show a dramatic change from very strong nonlinearities for lightly-doped samples at low temperatures, to nearly ohmic behaviour for higher temperatures and doping levels. At low temperatures (below 10-30 K), the I-V characteristics are independent of temperature and follow the expression for Zener-type tunnelling,...
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