发表机构
Karlsruhe Institute of Technology; Johannes Gutenberg-Universität; Deutsches Elektronen-Synchrotron DESY; Stockholm University; Christian-Albrechts-Universität zu Kiel（卡尔斯鲁厄理工学院; 约翰内斯·古腾堡大学; 德国电子同步加速器; 斯德哥尔摩大学; 基尔大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文介绍ToF-PAX-RIXS，一种结合ARPES与RIXS的紧凑型飞行时间谱仪，通过多模式电子光学实现同一样品顺序测量，并在Ca掺杂YBa2Cu3O6.45上验证其关联电子结构与集体激发的能力。
AI 中文摘要
我们展示了ToF-PAX-RIXS，一种紧凑型仪器，它将飞行时间动量显微镜角分辨光电子能谱（ARPES）与共振非弹性X射线散射（RIXS）相结合。后者基于用于X射线分析的光电子能谱法（PAX）。这两种技术通过单一的多模式电子光学柱实现，允许在相同实验条件下对同一样品依次进行测量。在ARPES模式下，仪器记录光电子强度作为动能和两个面内动量分量的函数。在PAX-RIXS模式下，散射的软X射线光子被吸收在薄金属转换器中，产生的光电子在能量和转换器上的发射位置方面被分析。电子动能保留了散射光子的光谱信息，而位置与散射角相关，因此与动量转移相关，从而能够同时访问有限的动量转移区间。我们描述了该仪器的机械设计、转换器组件、散射几何结构以及多模式电子光学系统。其PAX-RIXS性能在Cu $L_3$边使用CaCuO$_2$进行基准测试，使用了Au、Ag和Pt转换器。测量光谱再现了使用传统光栅RIXS光谱仪获得的主要特征，反卷积得到在当前条件下优于$120$~meV的有效重建能量分辨率。最后，对同一Ca掺杂YBa$_2$Cu$_3$O$_{6.45}$样品进行的联合ARPES和PAX-RIXS测量证明了该仪器在通用紧凑平台内关联电子结构和集体激发的能力。
英文摘要
We present ToF-PAX-RIXS, a compact instrument that combines time-of-flight momentum-microscopy angle-resolved photoemission spectroscopy (ARPES) with resonant inelastic X-ray scattering (RIXS). The latter is based on photoelectron spectrometry for analysis of X-rays (PAX). The two techniques are implemented with a single multimode electron-optical column, allowing measurements to be performed sequentially on the same sample under identical experimental conditions. In ARPES mode, the instrument records the photoemission intensity as a function of kinetic energy and two in-plane momentum components. In PAX-RIXS mode, scattered soft X-ray photons are absorbed in a thin metallic converter, and the generated photoelectrons are analyzed in energy and position of emission on the converter. The electron kinetic energy retains the spectral information of the scattered photons, while the position is related to the scattering angle and therefore to the momentum transfer, enabling simultaneous access to a finite momentum-transfer interval. We describe the mechanical design, converter assembly, scattering geometry, and multimode electron optics of the instrument. Its PAX-RIXS performance is benchmarked at the Cu $L_3$ edge using CaCuO$_2$, with Au, Ag, and Pt converters. The measured spectra reproduce the principal features obtained with a conventional grating RIXS spectrometer, and deconvolution yields an effective reconstructed energy resolution better than $120$~meV under the present conditions. Finally, combined ARPES and PAX-RIXS measurements on the same Ca-doped YBa$_2$Cu$_3$O$_{6.45}$ sample demonstrate the capability of the instrument to correlate electronic structure and collective excitations within a common compact platform.
