Abstract
Abnormal bipolar-like resistive changes are reported inTiO2 thin films sandwiched between Pt top and bottom electrodes. The abnormal behavior isshown relying on the applied voltage range. That is, normal bipolar switching is also shownin the same sample with the optimized voltage range. In the abnormal mode, both set- andreset-like changes in resistance take place under the same polarity of the applied voltage.This abnormal behavior is considered to be due to symmetric electroforming which isassumed to activate electrochemical reactions involving oxygen vacancies at bothPt/TiO2 interfaces. We analyze the abnormal behavior in terms of the interfacial resistive switchingtaking place on both interfaces nearly simultaneously.
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