Reliable 2D Phase Transitions for Low-Noise and Long-Life Memory Programming
| Autor: | Feng Rao, Keyuan Ding, Bin Chen, Tianci Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Phase transition
Computer science heterostructure 02 engineering and technology cycling endurance lcsh:Chemical technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Noise (electronics) phase-change random-access memory 0104 chemical sciences Low noise Crystal (programming language) Premature failure Neuromorphic engineering Key (cryptography) Electronic engineering two-dimensional phase transitions lcsh:TP1-1185 0210 nano-technology programming noise |
| Zdroj: | Frontiers in Nanotechnology, Vol 3 (2021) |
| ISSN: | 2673-3013 |
| DOI: | 10.3389/fnano.2021.649560 |
| Popis: | Extending cycling endurance and suppressing programming noise of phase-change random-access memory (PCRAM) are the key challenges with respect to the development of nonvolatile working memory and high-accuracy neuromorphic computing devices. However, the large-scale atomic migration along electrical pulse direction in the unconstrained three-dimensional phase transitions of the phase-change materials (PCMs) induces big resistance fluctuations upon repeated programming and renders the classic PCRAM devices into premature failure with limited cycling endurance. Previous efforts of superlattice-like and superlattice PCM schemes cannot effectively resolve such issues. In this work, we demonstrated that, through fine-tuning the sputtering techniques, a phase-change heterostructure (PCH) of Sb2Te3/TiTe2 can be successfully constructed. In contrast to its superlattice-like counterpart with inferior crystal quality, the well-textured PCH architecture ensures the reliable (well-confined) two-dimensional phase transitions, promoting an ultralow-noise and long-life operation of the PCRAM devices. Our study thus provides a useful reference for better manufacturing the PCH architecture and further exploring the excellent device performances and other new physics. |
| Databáze: | OpenAIRE |
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