在单层MoS2晶体管中增强载体移动性,具有过程诱导应变的晶体管
Yue Zhang1, He Lin Zhao2, Siyuan Huang1
1Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, United States.
ACS nano
|May 3, 2024
概括
研究人员在2D材料中使用过程诱导的应变,比如二硫化 (MoS2) 晶体管,以提高电子性能. 这种方法提高了载体的移动性和和电流,为先进的超电子打开了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 二维 (2D) 电子材料提供了下一代电子产品的潜力,因为它们具有出色的尺寸缩放.
- 整合2D材料与现有的CMOS工艺具有挑战性,对处理如何影响材料性能的理解有限.
- 应变和兴奋剂显著影响二维材料设备性能,但它们与制造步骤的相互作用尚未得到充分理解.
研究的目的:
- 研究过程诱导的应变对2D材料晶体管电子性能的影响.
- 展示使用半导体行业常见的技术,薄膜沉积,调整2D材料的应变.
- 为了将应变和兴奋剂的变化与单层MoS2晶体管中的设备性能相关联.
主要方法:
- 在单层MoS2晶体管中使用MgO应力层的代沉积来系统地改变拉伸应变.
- 结合拉曼光谱和电传输测量以分析应变,兴奋剂和设备特征.
- 在不同压力器厚度下,延展均性和机械稳定性的表征.
主要成果:
- 在MoS2通道中达到0.48±0.05%的均拉伸力,使用150nm的MgO应力.
- 观察到在较高压力剂厚度时的机械不稳定性和不均的应变.
- 显著提高了电子流动性 (130 ± 40% per % strain) 和频道和电流密度 (52 ± 20%) 随着拉力应变的增加.
结论:
- 工艺诱导的应变是一种有效的方法,可以提高2D晶体管中的载体移动性和电流密度.
- 已建立的CMOS制造技术可以适应2D材料的精确控制应变.
- 这种方法通过利用现有的行业流程,加速将二维电子整合到未来的计算架构中.
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