实现超过104的启/关比,用于2nm以下的垂直晶体管
Likuan Ma1, Quanyang Tao1, Yang Chen1
1Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China.
Nano letters
|August 30, 2023
概括
研究人员使用范德瓦尔斯金属接触器开发了超级垂直晶体管,以抑制道电流. 这种方法显著提高了二维材料晶体管的开/关比,克服了短通道设备的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 半导体物理 半导体物理
背景情况:
- 超缩放式晶体管对于下一代电子产品至关重要.
- 垂直晶体管面临的挑战是异常状态的道电流,限制了开/关的比率,特别是在5nm以下的通道长度.
- 尽量减少短通道效应对于设备性能至关重要.
研究的目的:
- 为了抑制垂直晶体管中的异常状态道电流.
- 为了提高超大尺度垂直晶体管的开/关比.
- 为减少短通道效应提供总体战略.
主要方法:
- 使用范德瓦尔斯金属接触器设计屏障高度.
- 在二硫化物 (MoS2) 垂直晶体管上对 (Pt) 电极进行分层.
- 描述金属/MoS2接口和设备性能.
主要成果:
- 通过利用 Pt 和 MoS2.2 之间的工作功能差异,实现了高的舒特基障碍.
- 有效地抑制了直接道电流.
- 实现的记录启/关比为5×10^5对于5nm和10^4对于2nm通道长的垂直晶体管.
- 展示了一个优化的金属/MoS2接口,由于低能耗层层工艺,缺陷最小.
结论:
- 范德瓦尔斯金属接触提供了一个可行的途径,以提高垂直晶体管的性能.
- 开发的方法通过减轻道电流,显著改善了开/关比.
- 这种方法为超大规模设备提供了可扩展的解决方案,并减少了短通道效应.
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