Novel k-space microscope for soft x-ray photoelectron spectroscopy of bulk materials and buried interfaces

用于散装材料和掩埋界面软 X 射线光电子能谱的新型 k 空间显微镜

• 批准号: 326948345
• 负责人: Professor Dr. Ralph Claessen
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/326948345?language=en
• 关键词: Novel; space; microscope; soft; ray

This project aims at the development of instrumentation for soft x-ray angle-resolved photoelectron spectroscopy (SX-ARPES) based on the novel concept of momentum- or k-space microscopy. For this purpose we will construct such an instrument for operation at high photon energies, and test and use it at the I09 soft x-ray beamline of the Diamond Light Source. Based on a special objective lens, optimized for momentum-space imaging, the instrument facilitates true two-dimensional electronic bandstructure mapping of solids with dramatically enhanced detection efficiency. Thereby overcoming the notoriously low count-rates of conventional SX-ARPES, this novel approach will allow to make full use of the central advantage of high-energy photoemission, namely its much larger probing depth, providing access to the bulk electronic structure and to buried interfaces. As case in point we want to use selected oxide heterostructures as testbed and study their fascinating electronic interface properties. The k-space microscope proposed here has the potential to revolutionize the field of photoelectron spectroscopy and open its application to new areas previously not thought to be accessible by this technique.

该项目旨在基于动量或K空间显微镜的新概念，开发了软X射线角度分辨光学光谱（SX-ARPES）的仪器。为此，我们将构建一种在高光子能量下运行的仪器，并在钻石光源的I09软X射线梁线上进行测试和使用。基于针对动量空间成像进行优化的特殊物镜镜头，该仪器促进了具有巨大增强的检测效率的固体的真实二维电子带映射。从而克服了常规SX-arpes的臭名昭著的低计数，这种新颖的方法将允许充分利用高能量光发射的核心优势，即其更大的探测深度，从而提供对散装电子结构的访问和掩埋的接口。例如，我们希望使用选定的氧化物异质结构作为测试床并研究其引人入胜的电子界面特性。此处提出的K空间显微镜具有彻底改变光电子光谱领域的潜力，并将其应用于以前无法通过此技术访问的新区域。