超薄SnS2基场效应晶体管中的神经形态光响应
Sebastiano De Stefano1, Ofelia Durante1, Andrea Sessa1
1Department of Physics "E. R. Caianiello", University of Salerno, Fisciano (SA), 84084, Italy.
ACS applied materials & interfaces
|August 26, 2025
概括
锡二硫化物 (SnS2) 场效应晶体管具有可调节的突触可塑性,用于神经形态计算. 陷状态和吸附剂可实现可塑性,通过温度和门电压进行调节,以获得强大的性能.
科学领域:
- 材料科学
- 凝聚物质物理学
- 神经科学
背景情况:
- 神经形态计算旨在模拟高级AI的生物神经网络.
- 二维 (2D) 材料为神经形态设备应用提供可调节的特性.
- 锡二硫化物 (SnS2) 是用于电子和光电子设备的有前途的二维材料.
研究的目的:
- 描述SnS2场效应晶体管 (FET) 的电气和光电子特性.
- 研究SnS2FETs持续光导和突触可塑性的机制.
- 探索SnS2在神经形态计算应用中的潜力.
主要方法:
- 后门式SnS2FET的电气和光电子特性.
- 在不同温度 (80-380 K),压力 (环境到10-4 mbar) 和照明条件 (420-800 nm激光) 下进行测量.
- 对陷状态和环境吸附物的分析,以了解观察到的现象.
主要成果:
- 观察到的响应度高达~100 A/W,以及持久的光导性.
- 照明后的电流保留率在黑暗电流的0%到30%之间.
- 通过利用陷状态来证明可调节的突触可塑性 (重量变化从0.001到3000).
结论:
- 微观机制,包括陷状态和吸附剂,控制SnS2中的可塑性.
- 温度和门电压有效调节突触可塑性,使短期到长期的行为转变成为可能.
- 在现实条件下SnS2表现出强度,为其融入神经形态结构铺平了道路.
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