Nanoscale Ring-Shaped Conduction Channels with Memristive Behavior in BiFeO₃ Nanodots.

ABSTRACT: Nanoscale ring-shaped conduction channels with memristive behavior have been observed in the BiFeO₃ (BFO) nanodots prepared by the ion beam etching. At the hillside of each individual nanodot, a ring-shaped conduction channel is formed. Furthermore, the conduction channels exhibit memristive behavior, i.e., their resistances can be continuously tuned by the applied voltages. More specifically, a positive (negative) applied voltage reduces (increases) the resistance, and the resistance continuously varies as the repetition number of voltage scan increases. It is proposed that the surface defects distributed at the hillsides of nanodots may lower the Schottky barriers at the Pt tip/BFO interfaces, thus leading to the formation of ring-shaped conduction channels. The surface defects are forme

SUBMITTER: Li Z 

PROVIDER: S-EPMC6315444 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature