挥发性值切换和通过使用肖特基缺陷的Ag扩散控制的突触性质
Yu-Rim Jeon1, Deji Akinwande1, Changhwan Choi2
1Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA.
Nanoscale horizons
|March 20, 2024
概括
这项研究引入了使用Ag/Ta2O5/HfO2/Pt的新型扩散记忆器,模仿低功耗低功耗的大脑功能. 该设备显示可靠的交换和突触特性,为先进的神经形态应用铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 固态电子 固态电子
- 神经科学是一个神经科学.
背景情况:
- 记忆器对于下一代计算至关重要,特别是对于神经形态应用.
- 控制金属氧化物结构中的离子扩散是开发高效的记忆装置的关键.
研究的目的:
- 研究一种新的扩散记忆器结构 (Ag/Ta2O5/HfO2/Pt),以模仿生物大脑功能.
- 分析设备的性能,包括功耗,切换可靠性和突触性质.
主要方法:
- 用Ag/Ta2O5/HfO2/Pt结构制造一个扩散记忆器.
- 使用电气测量 (SET电压,合规电流,循环测试) 来描述设备性能.
- 使用X射线光电子光谱 (XPS) 和能量分散式X射线光谱 (EDX) 分析Ag离子扩散.
主要成果:
- 实现了低功耗 (2mW在0.2V SET电压下) 和高选择性 (109).
- 经过20个周期的可靠和可重复的值切换,具有最小的SET变化 (SD=0.028).
- 由于受控的Ag离子扩散,经过验证的具有生物突触特性 (量子导电性,短期/长期记忆) 的挥发性切换.
结论:
- 开发的扩散记忆器表现出有希望的低功耗和神经形态能力.
- 在设计的控制和切换层中控制的Ag离子扩散可以提高设备的性能.
- 潜在的应用包括选择器,突触和先进的神经形态计算设备.
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