Abstract
While investigating the metal–polyvinylchloride (<1500 Å)–metal sandwich structure using Al, Ag, Cu, and In electrodes, two kinds of switching properties were found. The symmetric sandwiches with aluminum electrodes exhibited voltage-controlled negative resistance (VCNR) with memory, while asymmetric structures displayed current-controlled negative resistance (CCNR) with memory. It was not possible to observe both kinds of switching phenomena in a single sample. The VCNR mechanism may be explained on the basis of high-field domains (or an accumulation layer) and the CCNR phenomenon may be explained on the basis of a filamentary model.
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