时间分辨率ARPES,可调 12-21.6 eV XUV 在 400 kHz 重复率
Famin Chen1,2, Ji Wang1,3, Mojun Pan1,2
1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
The Review of scientific instruments
|December 11, 2023
概括
这项研究引入了一个可调节的时间分辨率和角度分辨率光辐射光谱学 (trARPES) 装置. 新系统使用极端紫外线提供了对固体中非平衡电子结构的精确测量.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 频谱学是一种光谱学.
背景情况:
- 时间分辨率和角度分辨率光辐射光谱学 (trARPES) 对于探测固体中非平衡电子结构至关重要.
- 现有的trARPES系统往往缺乏光子能量中的可调性,这限制了它们的应用范围.
研究的目的:
- 开发和描述一种具有可调节极紫外线 (XUV) 光子能量的新型trARPES装置.
- 证明该装置用于研究材料的平衡和非平衡电子性能的能力.
主要方法:
- 实施一个trARPES系统,可选择光子能量为12,16.8和21.6 eV,重复频率为400 kHz.
- 对每个波 (104-157 meV,154-276 fs) 的能量和时间分辨率的表征.
- 在样本上测量光子流量 (10^10-10^11 photons/s).
主要成果:
- 对于每个可调节的光子能量,trARPES装置的成功运行具有不同的能量和时间分辨率.
- 通过对拓材料Zr2Te2P和Bi2Se3.3进行平衡和非平衡ARPES测量来验证设置.
- 证明可调节的XUV光子能量对于获得全面的实验结果的重要性.
结论:
- 开发的trARPES装置为电子结构的先进研究提供了一个多功能平台.
- 在trARPES中调节的光子能量对于优化测量和揭示细微的材料特性至关重要.
- 这种仪器推进了在固态系统中研究动态电子现象的研究.
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