Detector for Inverse Photoemission Spectroscopy studies of Quantum Materials

逆光电发射是一种功能强大但尚未得到充分利用的探测材料电子结构的技术。它在强相关材料中具有特别的实用性，其中电子结构的计算具有根本性的挑战性，使得电子结构的测量对于理解材料的基本物理非常重要。这项技术的一个限制是缺乏商业上可用的技术，需要研究人员开发复杂的“自制”探测器。最近，用于逆光发射的商用盖革穆勒探测器首次问世。我们建议购买两个高分辨率的盖革穆勒带通光子探测器用于逆光电发射光谱。与现有系统集成，这些探测器将使我们的研究小组能够在铜超导体，Weyl半金属和拓扑绝缘体等量子材料中进行逆光发射实验，为这些材料的基础物理提供重要见解。

Inverse photoemission is a powerful but underutilized technique to probe the electronic structure of materials. It has particular utility in strongly correlated materials where calculations of electronic structure are fundamentally challenging, making measurements of electronic structure important for understanding the basic physics of the materials. One limitation of the technique has been the lack of commercially available technology, requiring researchers to develop complex, “home-made” detectors. Recently commercial Geiger Muller detectors for inverse photoemission have been made available for the first time. We propose to purchase two high-resolution Geiger Muller band-pass photon detectors for inverse photoemission spectroscopy. Integrated with an existing system, these detectors will enable our research group to perform inverse photoemission experiments in quantum materials such as cuprate superconductors, Weyl semimetals and topological insulators, providing important insights into the fundamental physics of these materials.