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In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
Published on: May 13, 2020
Competing Ferroelectric Polarization and Defect Migration Induced Resistive Switching in β'-In2Se3
Yinfeng Long1, Saiyu Bu2, Han Chen1
1School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Abstract:
Layered β'-In2Se3 has garnered significant attention due to its intriguing multiferroic properties. Until now, most studies have focused on a material-level understanding, with limited exploration of device-level properties. This work systematically investigates the in-plane resistive switching behavior of β'-In2Se3. Besides resistive switching resulting from ferroelectric polarization reversal, the critical role of defect migration is unveiled in determining the overall electrical characteristics of β'-In2Se3 devices. Specifically, we elucidate the contribution of electric-field-induced Se vacancy migration to resistive switching through time-dependent current evolution, in situ electric force microscopy, and density functional theory calculations. By considering the interplay between free carriers, bound charges, and mobile defects, a comprehensive physical picture of the complex resistive switching behavior of β'-In2Se3 devices is established. This work provides crucial insights into understanding and manipulating the resistive switching behavior of 2D vdW ferroelectric devices.
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