在基于Cu的电阻开关中,引发的金属丝断裂
Bo Xiao1, Xuefang Yu1, Wenzuo Li1
1The Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai, China.
Science and technology of advanced materials
|February 28, 2024
概括
来自基团的离子可以触发电阻开关中铜丝的破裂. 这一发现为基于阴离子的记忆器件的切换机制提供了新的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 固态电子 固态电子
- 计算化学的计算化学
背景情况:
- 基于阴离子的电阻开关是新型记忆器件的关键组件.
- 金属导线的形成/断裂是公认的切换机制.
- 在切换过程中H2O和-OH组的作用尚不清楚.
研究的目的:
- 理论上研究离子对Cu/Ta2O5/Pt设备中切换过程的影响.
- 为了阐明 H 触发的丝破裂背后的机制.
主要方法:
- 离子行为的理论建模和导线动力学.
- 对Cu-Cu键特性和离子扩散的分析.
主要成果:
- 离子从-OH组中解离,并积聚在Cu纤维上.
- 吸附的H离子会削弱Cu-Cu键并增加Cu离子电荷和扩散性.
- 这些变化导致Cu线丝破裂.
结论:
- 提出了一种新的"H触发金属丝断裂"模型.
- 该模型类似于脆化,Cu作为催化剂.
- 这种机制可能适用于其他基于Cu-cation的电阻开关.
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