在浅层Ge/SiGe异构结构上的Mn5Ge3接触的表征
Troy A Hutchins-Delgado1,2,3, Sadhvikas J Addamane1,2, Ping Lu1
1Sandia National Laboratories, Albuquerque, NM 87185, USA.
Nanomaterials (Basel, Switzerland)
|March 27, 2024
概括
在/- (Ge/SiGe) 量子井上成功制造了聚 (Mn5Ge3) 接触器. 这些接触器具有出色的p型导电性和可调节的电特性,使它们适合用于自旋电子设备.
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
- 半导体螺旋电子学 半导体螺旋电子学
背景情况:
- 开发高效的自旋注入和检测材料对于推进自旋电子设备至关重要.
- 基于的异构结构对量子信息处理具有前景.
- 基曼化物 (Mn5Ge3) 是一种铁磁材料,有可能用于自旋电子应用.
研究的目的:
- 在Ge/SiGe量子井异构结构上研究基于Mn5Ge3的接触器的制造.
- 描述这些Mn5Ge3/Ge/SiGe接触器的结构和电气性能.
- 评估Mn5Ge3作为Ge/SiGe系统中自旋电子应用的接触材料的适用性.
主要方法:
- 对于Mn5Ge3接触形成的固态合成.
- 用于结构分析的X射线衍射 (XRD).
- 高分辨率扫描传输电子显微镜 (HR-STEM) 和能量分散式X射线光谱 (EDX) 用于相位验证.
- 肖特基二极管,输电线和霍尔测量用于电气表征.
主要成果:
- 在Ge和Ge/SiGe异构结构上成功形成Mn5Ge3基接触,由XRD和HR-STEM/EDX证实.
- 在Mn5Ge3接触器中,Mn5Ge3接触器对Ge/SiGe量子井具有良好的p型特性.
- 实现了低斯科特基屏障高度 (0.10 eV) 和接触电阻 (~1 kΩ).
- 电气性能显示出门电压的依赖性,表明可调性.
结论:
- Mn5Ge3是Ge/SiGe量子井异构结构的可行接触材料.
- 已证明的低斯科特基屏障高度和可调节的电气性能是旋转电子设备应用的优势.
- 这项工作为高效的自旋注入和探测在以为基础的自旋电子器件铺平了道路.
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