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Journal Article
Electrical properties and conduction mechanisms of ε-GaSe films for selector and phase-change memory applications
- Authors
- So-Young Lim, Chohyeon Park, Dae-Hyung Cho, Tae-Ha Hwang, Yong-Duck Chung, Woo-Jung Lee, Jung-Wook Lim
- Issue Date
- 2025-02
- Citation
- Applied Surface Science, v.682, pp.1-8
- ISSN
- 0169-4332
- Publisher
- Elsevier BV
- Language
- English
- Type
- Journal Article
- Abstract
- Owing to the pressing requirement for advanced memory solutions driven by explosive data growth, nonvolatile and fast-operating 1S1R structured XPoint memory has become a prominent focus, with recent interest shifting towards the 1S structured selector-only memory. The use of chalcogenide-based materials in these technologies constrains the application of such memories because of their complex quaternary compositions. This study investigated the previously unreported potential of GaSe, a simple binary Se-based chalcogenide, for applications as a selector and phase-change memory (PCM). In this study, ε-GaSe thin films were deposited using thermal evaporation and subsequently annealed in a Se atmosphere for 1 and 2 h. These ε-GaSe thin film devices incorporated metal–insulator–metal construction to exhibit both selector and PCM characteristics. The ε-GaSe device that was Se-annealed for 1 h demonstrated superior performance with a lower threshold voltage and off current, high selectivity as a selector, and reduced set voltage and reset power as a PCM. These characteristics render the proposed device a highly promising candidate for dual selector/PCM applications. To explain the electrical behavior of the ε-GaSe device, we propose the conduction mechanism model depending on the Se-annealing time, which is related to the change in the physical properties of ε-GaSe.
- KSP Keywords
- 1 H, 2 H, Annealing time, Electrical behavior, Electrical properties, GaSe thin films, High selectivity, Mechanism model, Memory applications, Off current, Phase Change Material(PCM)
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
