Resonant x-ray scattering and inverse photoemission in superconductors and oxide electronics

超导体和氧化物电子学中的共振 X 射线散射和逆光电发射

• 批准号: 355452-2013
• 负责人: Hawthorn, David
• 金额: $ 1.53万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633525
• 关键词: Resonant; ray; scattering; inverse; photoemission

One of the forefronts of modern materials research is the study of new generations of materials broadly classified as quantum materials. These materials can exhibit strong interactions between electrons, which leads to phenomena that is often both technologically relevant and fundamentally challenging to our understanding of condensed matter physics. A key example of such materials are the cuprate and pnictide high-temperature superconductors. These materials exhibit superconductivity at elevated temperatures, which holds promise for power generation, transportation and storage technologies that can play an important role in our future energy infrastructure. Equally, these materials present a grand challenge to our understanding of materials and the dual goals of understanding the mechanism of high temperature superconductivity and developing a room temperature superconductor for practical applications are two of the greatest outstanding problems in physics. Underlying these problems is a need to understand the roles that strong correlations and charge, spin, orbital and lattice ordering phenomena have in quantum materials. Our proposed research program aims to tackle these grand challenges by pursuing a few key research streams: 1. Investigating stripe order in cuprate superconductors using resonant soft x-ray scattering; 2. Investigating oxide interfaces and multilayers using resonant x-ray reflectivity, and; 3. Investigating electronic structure in quantum materials using inverse photoemission spectroscopy.

现代材料研究的前沿之一是对广义上被归类为量子材料的新一代材料的研究。这些材料可以在电子之间表现出强烈的相互作用，这导致了一些现象，这些现象通常既与技术相关，又从根本上挑战了我们对凝聚态物理的理解。这种材料的一个关键例子是铜和镍高温超导体。这些材料在高温下表现出超导性，这为发电、运输和存储技术带来了希望，在我们未来的能源基础设施中发挥重要作用。同样，这些材料对我们对材料的理解提出了巨大的挑战，理解高温超导的机制和开发实际应用的室温超导体的双重目标是物理学中两个最大的突出问题。这些问题的基础是需要理解强相关性和电荷、自旋、轨道和晶格有序现象在量子材料中的作用。我们提出的研究计划旨在通过追求几个关键的研究流来解决这些重大挑战：用软x射线共振散射研究铜超导体中的条纹有序2. 利用共振x射线反射率研究氧化物界面和多层；3. 利用逆光谱学研究量子材料中的电子结构。