Hidden orders in double-perovskite quantum materials

我们建议在多伦多大学的Young-June Kim小组和日本名古屋大学的Daigorou Hirai小组之间开展研究合作，研究具有隐藏秩序的新型量子材料。这种隐藏的秩序被认为是由多极矩产生的，这是迄今为止在量子材料中发现的电子未被探索的方面。在由重过渡金属元素组成的材料中，有趣的新量子现象似乎是由于多极矩，如电荷四极或磁八极，以及它们的相互作用。为了阐明这种多极矩的内部工作原理，并找到在量子技术应用中使用多极矩的方法，我们建议合作研究具有Re6+离子的双钙钛矿化合物。我们将使用一种称为共振非弹性x射线散射（RIXS）的最先进的光谱工具来确定多极矩相互作用的性质。这项研究将为加拿大和国际合作者开发和部署对量子信息科学有用的新量子材料开辟新的机会。

We propose to initiate a research collaboration between the Young-June Kim group at the University of Toronto and the Daigorou Hirai group at Nagoya University in Japan to study novel quantum materials with hidden orders. Such hidden orders are attributed to arise from multipolar moments, hitherto unexplored facets of electrons found in quantum materials. Interesting novel quantum phenomena in materials made up of heavy transition-metal elements seem to be due to multipolar moments, such as charge quadrupoles or magnetic octupoles, and their interactions. To shed light on the inner workings of such multipolar moments and find ways to use multipolar moments in quantum technology applications, we propose to collaborate on the study of double perovskite compounds with Re6+ ions. We will use a state-of-the-art spectroscopy tool called resonant inelastic x-ray scattering (RIXS) to determine the nature of multipolar moment interactions. This study will open new opportunities for Canadian and international collaborators to develop and deploy new quantum materials useful for quantum information science.