標題: A comprehensive study of enhanced characteristics with localized transition in interface-type vanadium-based devices
作者: Lin, C. -Y.
Chen, P. -H.
Chang, T. -C.
Huang, W. -C.
Tan, Y. -F.
Lin, Y. -H.
Chen, W. -C.
Lin, C. -C.
Chang, Y. -F.
Chen, Y. -C.
Huang, H. -C.
Ma, X. -H.
Hao, Y.
Sze, S. M.
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Selector;Vanadium oxide;Threshold switching;Electrode;Schottky thermal emission;Metal-insulator transition
公開日期: 1-Jun-2020
摘要: In this research, we investigated the conduction mechanism in metal-insulator transition (MIT) materials. Among these MIT materials (NbOx, NiOx, VOx, and TaS2), vanadium oxide-based selectors have been widely investigated because of their high switching speed (similar to 10-ns transition time), sufficient nonlinearity (>10(3)), and endurance stability (similar to 10(10)). Abnormal temperature-dependent degradation in the high resistive state was observed, as was studied in detail by a current fitting analysis and explored theoretically by electric (E-MIT) and thermal (T-MIT) modeling. The results suggest the existence of a MIT region located between the electrode and the localized filament. To improve the localized transition efficiency, we propose an enhanced-type MIT architecture to bypass the E-MIT and T-MIT universal rule with the novel structure of vanadium top electrode device. As compared with a vanadium oxide middle-layer device, the electrical transition efficiency is improved 2-fold as evidenced by thermal cycling material analysis, as well as boosting endurance reliability to 10(7) at 65 degrees C. Finally, for the first time, a potential neuromorphic computing application featuring a damping oscillator has been demonstrated in this enhanced-type MIT architecture, with a high damping ratio with 10-fold smaller area and 5-fold smaller energy than complementary metal-oxide-semiconductor (CMOS) devices. This presents a promising milestone for ultralow power neuromorphic system design and solutions in the near future. (C) 2020 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.mtphys.2020.100201
http://hdl.handle.net/11536/155131
ISSN: 2542-5293
DOI: 10.1016/j.mtphys.2020.100201
期刊: MATERIALS TODAY PHYSICS
Volume: 13
起始頁: 0
結束頁: 0
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