Recent Progress in Selector and Self‐Rectifying Devices for Resistive Random‐Access Memory Application

• Published in: Physica status solidi. PSS-RRL. Rapid research letters 2021-09, Vol.15 (9), p.n/a
• Main Authors: Dongale, Tukaram D., Kamble, Girish U., Kang, Dae Yun, Kundale, Somnath S., An, Ho-Myoung, Kim, Tae Geun
• Format: Article
• Language: English
• Subjects: crossbar arrays; resistive random-access memories; selector devices; Selectors; self-rectifying resistive switching devices; Semiconductor devices; sneak path current; Switching; switching mechanisms; Transistors
• ISSN: 1862-6254; 1862-6270
• DOI: 10.1002/pssr.202100199

The recent progress of selector and self‐rectifying devices for resistive random‐access memory applications is reviewed. In particular, the performance of crossbar arrays based on resistive switching (RS) devices, the sneak‐path current issue, and possible solutions is discussed. The parameters and requirements of selector devices are elucidated here, and several types of selector devices, such as a transistor‐assisted transistor‐one resistor, unipolar one diode‐one resistor, bipolar one selector‐one resistor, and threshold switching selectors, are comprehensively discussed. In the case of self‐rectifying devices, the recent progress in complementary RS devices, vacancy‐modulated conductive oxide‐based devices, and tunneling barrier‐based RS devices is reviewed. The switching mechanisms and the geometrical configuration of the selector and self‐rectifying RS devices are emphasized. Furthermore, comparative assessments of the different devices are evaluated. Finally, an overview of the gaps in previously reported devices is presented and some key improvements for future research direction suggested. The present status of the selector and self‐rectifying devices for resistive memory applications are summarized, with particular focus on the origin of the sneak current paths of the crossbar memory array and their different ways for mitigation. The different device parameters and technological requirements of the selector and self‐rectifying devices are clarified.