在具有高道概率的2D Ge/GaAs异构结构中从肖特基接触到欧米接触的过渡
Yang Shen1,2, Jianfeng Zhu1, Qihao Zhang1
1Institute of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, P. R. China. yshen@cjlu.edu.cn.
Physical chemistry chemical physics : PCCP
|March 1, 2024
概括
在金属半导体连接处实现低电阻的欧姆接触是具有挑战性的. 这项研究表明,德国/GaAs连接可以通过应变或电场过渡到欧米接触,增强2D电子设备的电子注入.
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:
- 金属半导体 (M-S) 接触对电子设备至关重要,决定了它们的性能.
- 在金属半导体接口 (MSJs) 中实现低电阻欧姆接触仍然是一个重大挑战.
研究的目的:
- 系统地研究德 (Ge) /GaAsMSJs的电子特性.
- 探索在Ge/GaAs的MSJ中将Schottky接触转换为Ohmic接触的方法.
- 评估Ge/GaAs异构结构对于先进的2D电子纳米设备的潜力.
主要方法:
- 理论研究带结构,静电潜力和电荷转移.
- 计算Schottky屏障高度,有效载体质量和道挖掘概率.
- 对双轴应变和电场对MSJ特性影响的分析.
主要成果:
- Ge/GaAs MSJ具有可调节的特性,允许通过应变或电场从Schottky接触过渡到欧米接触.
- 费米水平固定 (FLP) 效应减弱,减少接触电阻.
- 与其他2D范德瓦尔斯MSJ相比,Ge/GaAsMSJ显示出更高的电子注入效率 (>27%).
结论:
- Ge/GaAs异构结构为高性能二维电子纳米设备提供了一个有前途的平台.
- 可控制的应变和电场在优化MS接触特性方面是有效的.
- 提升的电子注入效率突显了Ge/GaAs在下一代电子产品中的潜力.
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