Abstract
For examination of control of conductivity of a single molecule, the dc current-voltage relation has been investigated in a system based on a ferroelectric material, potassium dihydrogen phosphate KH2PO4, and a π-conjugated polymer, poly-p-phenylene vinylene, and its system is demonstrated to cause current-controlled electrical switching that is similar to that of a chalcogenide glass alloy. The switching phenomenon occurs even in repeated runs, although the voltage drop near the critical current value in the first run is unstable compared to that in the following runs. Furthermore, little change in the temperature of the specimen is observed over the entire range in the high- and low-resistivity states. This indicates the negative possibility of a heating effect on the switching phenomenon.
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