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加强合金2D人工晶体管中耐缺陷状态的突触可塑性
Jina Bak1, Seunggyu Kim1, Kyumin Park1
1Department of Materials Science and Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea.
ACS applied materials & interfaces
|August 24, 2023
概括
在二维 (2D) tungsten diselenide (WSe2) 纳米材料中用 (Nb) 进行物理化,可以增强人工突触可塑性. 这种方法改善了电荷的捕获和解锁,从而提高了神经形态计算的设备性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 神经科学是一个神经科学.
背景情况:
- 二维 (2D) 材料对神经形态计算具有前景.
- 在二维材料中不稳定的电荷捕获阻碍了场效应晶体管中的突触可塑性.
- 纳米晶体和介电介质之间的接口陷会导致人工突触器件出现问题.
研究的目的:
- 开发一种使用二维纳米材料增强人工突触器件的策略.
- 研究物理兴奋剂对突触可塑性和设备性能的影响.
- 改进2D过渡金属二二甲基化物中的电荷捕获和脱落过程.
主要方法:
- 用 (Nb) 对二维化 (WSe2) 纳米材料进行物理注.
- 用添加WSe2的基于人工突触器件的制造和表征.
- 突触可塑性的实验分析,包括短期/长期可塑性,多层次状态和功耗.
- 密度函数理论 (DFT) 计算,以了解对电荷捕获机制的兴奋剂效应.
主要成果:
- 兴奋剂在WSe2.2的带隙中引入了充电陷水平.
- 兴奋剂减缓了被困电荷的衰变,增强了突触可塑性.
- Nb-doped WSe2 设备表现出改善的短期/长期可塑性,增加多层状态,更低的功耗,以及更好的对称比率.
结论:
- 物理兴奋剂是促进人工突触器件的有效策略.
- 在WSe2中的兴奋剂增强了电荷捕获和解锁机制,提高了设备的性能.
- 物理杂的电子突触显示出开发生物灵感的人工电子设备的前景.
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