在神经形态计算中用于高性能突触晶体管的WS2的原子Nb兴奋剂
Kejie Guan1,2, Yinxiao Li1,3, Lin Liu1
1i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu, 215123, China.
Microsystems & nanoengineering
|September 26, 2024
概括
将 (Nb) 加入二硫化物 (WS2) 中,可以增强突触晶体管,实现100倍更高的开关比率. 这种兴奋剂方法改善了电子的捕获和脱落,使得高效的学习模拟和高精度的手写数字识别.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 设备物理 设备物理
背景情况:
- 由于它们的集成潜力,越来越多地探索了原子薄的二维 (2D) 过渡金属二甲基化物 (TMDC) 作为突触晶体管.
- 替代性兴奋剂提供了一种方法,可以精确地设计2D材料的物理特性,以达到突触可塑性.
研究的目的:
- 通过提高它们的开关比率来提高突触晶体管的性能.
- 研究二硫化 (WS2) 通道材料中 (Nb) 替代性兴奋剂的影响.
主要方法:
- 在 (W) 位点用 (Nb) 原子对WS2进行选择性替代注.
- 制造和表征Nb-dopedWS2突触晶体管.
- 评估设备性能,包括开关比率和学习能力.
主要成果:
- Nb-doped WS2突触晶体管实现了10^3的开关比率,比未使用的WS2设备提高了100倍.
- 原子有效地促进了电子的捕获和脱落,这对突触功能至关重要.
- Nb-WS2晶体管展示了突触强化,抑制和学习过程的准确模拟.
- 在125次训练代后,在MNIST手写数字数据集上实现了92.30%的识别准确度.
结论:
- 用Nb替代WS2的兴奋剂是一种可行的和可访问的方法,可以显著提高突触晶体管的性能.
- 工程Nb-WS2材料显示了神经形态计算应用的前景,特别是在手写数字识别方面.
- 这项工作为优化下一代突触设备中的通道材料的兴奋剂策略提供了洞察力.
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