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.
Bibliographical noteFunding Information:
T.D.D. and G.U.K. contributed equally to this work. This study was supported by the National Research Foundation of Korea, funded by the Korean government (No. 2016R1A3B1908249).
© 2021 Wiley-VCH GmbH
- crossbar arrays
- resistive random-access memories
- selector devices
- self-rectifying resistive switching devices
- sneak path current
- switching mechanisms
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics