TiO 2 ‐Based Schottky Diodes as Bidirectional Switches for Bipolar Resistive Memories

Zhang, Xijian; Jin, Jidong; Kim, Jaekyun; Balocco, Claudio; Zhang, Jiawei; Song, Aimin

Abstract

This study presents TiO2‐based Schottky diodes designed as bidirectional switches for bipolar resistive memories. The TiO2 films in these Schottky diodes are prepared through an anodization process. The reverse current of these diodes exhibits an exponential increase with rising reverse voltage, ultimately matching the forward current. When two diodes are connected back‐to‐back, they demonstrate superior current–voltage symmetry and provide a wider off‐state voltage range compared to a single diode, reaching up to 3.65 V. The adjustable off‐state voltage range (0.40–3.65 V) of the switch, whether utilizing two diodes or a single diode, correlates well with the TiO2 layer thickness and oxygen partial pressure during Pt electrode sputtering. These diodes possess bidirectional switching characteristics and can serve as effective switch elements to address the sneak‐path issue in bipolar resistive memories.

Citation

Zhang, X., Jin, J., Kim, J., Balocco, C., Zhang, J., & Song, A. (2024). TiO 2 ‐Based Schottky Diodes as Bidirectional Switches for Bipolar Resistive Memories. physica status solidi (RRL) - Rapid Research Letters, 18(12), Article 2400156. https://doi.org/10.1002/pssr.202400156

• Journal Article Type: Article
• Acceptance Date: Jun 15, 2024
• Online Publication Date: Jun 30, 2024
• Publication Date: Dec 1, 2024
• Deposit Date: Jul 15, 2024
• Publicly Available Date: Jul 15, 2024
• Journal: physica status solidi (RRL) – Rapid Research Letters
• Print ISSN: 1862-6254
• Electronic ISSN: 1862-6270
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 18
• Issue: 12
• Article Number: 2400156
• DOI: https://doi.org/10.1002/pssr.202400156
• Keywords: bipolar resistive memory, titanium oxide, bidirectional switches, Schottky diodes
• Public URL: https://durham-repository.worktribe.com/output/2597319