Multistate storage through successive phase change and resistive change

  • Liangcai Wu
    Chinese Academy of Sciences State Key Laboratory of Functional Materials for Informatics and Nanotechnology Laboratory, Shanghai Institute of Micro-system and Information Technology, , Shanghai 200050, People’s Republic of China
  • Zhitang Song
    Chinese Academy of Sciences State Key Laboratory of Functional Materials for Informatics and Nanotechnology Laboratory, Shanghai Institute of Micro-system and Information Technology, , Shanghai 200050, People’s Republic of China
  • Feng Rao
    Chinese Academy of Sciences State Key Laboratory of Functional Materials for Informatics and Nanotechnology Laboratory, Shanghai Institute of Micro-system and Information Technology, , Shanghai 200050, People’s Republic of China
  • Yuefeng Gong
    Chinese Academy of Sciences State Key Laboratory of Functional Materials for Informatics and Nanotechnology Laboratory, Shanghai Institute of Micro-system and Information Technology, , Shanghai 200050, People’s Republic of China
  • Songlin Feng
    Chinese Academy of Sciences State Key Laboratory of Functional Materials for Informatics and Nanotechnology Laboratory, Shanghai Institute of Micro-system and Information Technology, , Shanghai 200050, People’s Republic of China

書誌事項

公開日
2009-06-15
DOI
  • 10.1063/1.3156824
公開者
AIP Publishing

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説明

<jats:p>Combination of phase change and resistive change was proposed to achieve multistate storage in one cell and Ge2Sb2Te5 (GST)/tungsten oxide (WOx) stack was fabricated. In reset process, three resistance staircases were observed, corresponding to the device transition from low-resistance-state (LRS) to a medium-resistance-state (MRS) first, and then transition from the MRS to high-resistance-state (HRS). In set process, two S-shaped negative-differential-resistances were observed, corresponding to the device transition from HRS to MRS first, and then transition from MRS to LRS. The GST/WOx architecture with successive phase change and resistive change is considered to have potential for multistate storage.</jats:p>

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