Characterization and modeling of resistive switching phenomena in IGZO devices

Carvalho, G.; Pereira, M. E.; Silva, C.; Deuermeier, J.; Kiazadeh, A.; Tavares, V.

http://hdl.handle.net/10362/150738

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This study explores the resistive switching phenomena present in 4 μm2 amorphous Indium-Gallium-Zinc Oxide (IGZO) memristors. Despite being extensively reported in the literature, not many studies detail the mechanisms that dominate conduction on the different states of IGZO-based devices. In this article, we demonstrate that resistive switching occurs due to the modulation of the Schottky barrier present at the bottom interface of the device. Furthermore, thermionic field emission and field emission regimes are identified as the dominant conduction mechanisms at the high resistive state of the device, while the bulk-limited ohmic conduction is found at the low resistive state. Due to the high complexity associated with creating compact models of resistive switching, a data-driven model is drafted taking systematic steps.

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Funding Information: This research was funded by FEDER funds through the COMPETE 2020 Programme and National Funds through the FCT (Portuguese Foundation for Science and Technology) under the scope of the Doctoral Grant No. DFA/BD/8335/2020. Publisher Copyright: © 2022 Author(s).