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由多晶单层二硫化物制成的多端子晶体管
Vinod K Sangwan1, Hong-Sub Lee1, Hadallia Bergeron1
1Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Nature
|February 23, 2018
概括
研究人员使用二硫化 (MoS2) 开发了一种新型的多终端晶体管. 这种设备使复杂的神经形态学习和模仿大脑功能超出传统的双终端memristors的能力.
科学领域:
- 材料科学
- 电气工程
- 神经科学
背景情况:
- 记忆器对于非易失性记忆和神经形态计算至关重要,比闪存具有优势.
- 双终端记忆器表现出基本的神经功能能力,但缺乏像异质突触可塑性这样的高级功能的复杂性.
- 现有的多终端方法未能将记忆切换与晶体管功能整合起来.
研究的目的:
- 通过实验实现多终端混合记忆器和晶体管 (记忆管).
- 调查二硫化物 (MoS2) 在制造先进的晶体管中的潜力.
- 使用新型设备展示复杂的神经形态功能,包括异质突触可塑性.
主要方法:
- 使用多晶单层二硫化物 (MoS2) 制造多端子晶体管.
- 设备性能的表征,包括门调度,切换比率,耐久性和保持性.
- 使用现场扫描探针显微镜,冷电荷传输测量和设备建模来了解切换机制.
主要成果:
- 展示了一个可扩展的MoS2晶体管制造工艺.
- 在阻力状态下达到四个数量级的门调性,具有很高的耐久性和保持性.
- 在六端 MoS2 晶体管中表现出可调节的异质突触功能,模仿复杂的神经可塑性.
结论:
- 开发的MoS2晶体管在多终端配置中无集成晶体管和晶体管的功能.
- 这种设备可以实现复杂的神经形态学习和先进的突触功能,
- 这项研究揭示了偏差诱导的MoS2缺陷运动通过调节Schottky屏障高度来驱动电阻切换,从而提供了对二维材料物理学的见解.
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