在VO2微电阻中调整电阻切换的内在随机性
Noémie Bidoul1, Nicolas Roisin1, Denis Flandre1
1Institute for Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), UCLouvain, Louvain-la-Neuve 1348, Belgium.
Nano letters
|May 17, 2024
概括
研究了二氧化瓦纳 (VO2) 微电阻在周期间的变化. 与设备尺寸相比较的较小颗粒大小增加了门电压变化,为神经形态计算应用提供了设计见解.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 二氧化 (VO2) 微电阻表现出电阻切换,使神经形态系统中的神经元能够模拟神经元.
- 在VO2设备中,自循环到循环的内在变化可以对应用程序产生不利或有益的影响.
研究的目的:
- 为了研究VO2微电阻中关于颗粒大小和装置尺寸的随机性.
- 了解设备参数对电阻开关变化的影响.
主要方法:
- 在多个循环中进行高分辨率的电气和光学测量.
- 对具有不同粒度和尺寸的VO2微电阻的分析.
- 绝缘电阻与值电压分布的相关性.
主要成果:
- 门电压在周期间的变化增加,当颗粒大小接近设备尺寸时.
- 在较小长度电阻中观察到的多模式值电压分布.
- 鉴定出明显的透路径和细丝是多式联络分布的潜在原因.
结论:
- 提供了经过实验验证的指导方针,用于设计具有可控随机性的VO2设备.
- 通过最大限度地减少或最大限度地减少变化,研究结果可以优化VO2设备的特定神经形态应用.
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