中国物理B ›› 2016, Vol. 25 ›› Issue (12): 127303-127303.doi: 10.1088/1674-1056/25/12/127303
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Han-Lu Ma(马寒露), Zhong-Qiang Wang(王中强), Hai-Yang Xu(徐海阳), Lei Zhang(张磊), Xiao-Ning Zhao(赵晓宁), Man-Shu Han(韩曼舒), Jian-Gang Ma(马剑钢), Yi-Chun Liu(刘益春)
Han-Lu Ma(马寒露), Zhong-Qiang Wang(王中强), Hai-Yang Xu(徐海阳), Lei Zhang(张磊), Xiao-Ning Zhao(赵晓宁), Man-Shu Han(韩曼舒), Jian-Gang Ma(马剑钢), Yi-Chun Liu(刘益春)
摘要:
In this study, the unipolar resistive switching (URS) and bipolar resistive switching (BRS) are demonstrated to be coexistent in the Ag/ZnO/Pt memory device, and both modes are observed to strongly depend on the polarity of forming voltage. The mechanisms of the URS and BRS behaviors could be attributed to the electric-field-induced migration of oxygen vacancies (VO) and metal-Ag conducting filaments (CFs) respectively, which are confirmed by investigating the temperature dependences of low resistance states in both modes. Furthermore, we compare the resistive switching (RS) characteristics (e.g., forming and switching voltages, reset current and resistance states) between these two modes based on VO- and Ag-CFs. The BRS mode shows better switching uniformity and lower power than the URS mode. Both of these modes exhibit good RS performances, including good retention, reliable cycling and high-speed switching. The result indicates that the coexistence of URS and BRS behaviors in a single device has great potential applications in future nonvolatile multi-level memory.
中图分类号: (Metal-semiconductor-metal structures)