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Updated: Jul 18, 2025

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
Published on: May 13, 2020
Interface roughness effects and relaxation dynamics of an amorphous semiconductor oxide-based analog resistance
G R Haripriya1, Hee Yeon Noh1, Chan-Kang Lee1
1Division of Nanotechnology, DGIST, 42988, South Korea. dear.hjlee@dgist.ac.kr.
Abstract:
The analog resistive switching properties of amorphous InGaZnO (a-IGZO)-based devices with Al as the top and bottom electrodes and an Al-O interface layer inserted on the bottom electrode are presented here. The influence of the electrode deposition rate on the surface roughness was established and proposed as the cause of the observed unusual anomalous switching effects. The DC electrical characterization of the optimized Al/a-IGZO/AlO/Al devices revealed an analog resistive switching with a satisfactory value for retention levels, but the endurance was found to decrease after 200 cycles. The predominant conduction mechanism in these devices was found to be thermionic emission. An in-depth analysis was performed to explore the relaxation kinetics of the device and it was found that the current has a lower decay rate. The current level stability was tested and found reliable even after 5 h. The cost-effective and precious metal-free nature of the a-IGZO memristor investigated in this study makes it a highly desirable candidate for neuromorphic computing applications.
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