Synthesis and Advanced Characterization of Quantum Materials

量子材料的合成和高级表征

• 批准号: RGPIN-2019-06383
• 负责人: Luke, Graeme
• 金额: $ 2.99万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=738877
• 关键词: Synthesis; Advanced; Characterization; Quantum; Materials

This proposal seeks support for my research program in the experimental study of Quantum Materials. These materials are important as they challenge traditional theories and exhibit novel properties corresponding to new emergent electronic states of matter which may underlie next-generation technologies such as high field magnets for MRI or qubits for quantum computation. My research program is interdisciplinary in nature, involving physicists, chemists and material scientists. It is also highly collaborative, involving international leading scientists and both graduate and undergraduate stages in all stages of the research. My students will become expert in a wide variety of advanced experimental techniques giving them transferrable skills that they will be able to apply in both industry and academic research environments. My students will present their research at international conferences including the APS March meeting as well as at topical meetings and summer schools. The long term objective of my research is to discover, synthesize and understand new Quantum Materials with novel properties. My group and I will continue to grow and characterize new magnetic systems where geometrical frustration or low dimensionality lead to the emergence of novel excitations. These systems will include materials whose crystal structure involves triangular motifs to promote frustration including the pyrochlore (corner-sharing tetrahedra), Kagome and stacked triangular lattices. We will explore the role of single ion properties in selecting the magnetic ground state and the nature of the spin excitations. We will continue our program to identify and characterize unconventional superconductors exhibiting broken time reversal symmetry or anisotropic pairing states which may indicate the presence of topologically non-trivial states which might useful for future quantum computers. The proposed studies will involve a wide range of experimental techniques, starting with materials synthesis using optical image and electrical tri-arc furnaces. We will measure ac and dc magnetic susceptibility down to 0.5K (a unique capability in Canada). We will use the volume-sensitive technique of muon spin rotation/relaxation to measure the local real space magnetic properties of materials using a range of new facilities at TRIUMF, including a new CFI-funded high energy muon beam. We will use neutron scattering to measure the corresponding reciprocal space magnetic properties and excitations. We will develop and apply the Beta-detected nuclear magnetic resonance technique at the ISAC facility of TRIUMF where a three-fold increase in available beam time will shortly become available. This research program will result in new understanding of Quantum Materials, identifying new electronic states of matter and emergent excitations. Students will be trained at the forefront of this field as their careers develop through this research.

该提案寻求对我的量子材料实验研究项目的支持。这些材料很重要，因为它们挑战了传统理论，并表现出与新出现的物质电子态相对应的新颖特性，这可能是下一代技术的基础，例如用于 MRI 的高场磁体或用于量子计算的量子位。我的研究项目本质上是跨学科的，涉及物理学家、化学家和材料科学家。它还具有高度协作性，涉及国际领先的科学家以及研究生和本科生阶段的所有研究阶段。我的学生将成为各种先进实验技术的专家，使他们能够在工业和学术研究环境中应用可转移的技能。我的学生将在国际会议上展示他们的研究成果，包括 APS 三月会议以及专题会议和暑期学校。我研究的长期目标是发现、合成和理解具有新颖特性的新量子材料。我和我的团队将继续发展和表征新的磁系统，其中几何挫败或低维导致新的激发的出现。这些系统将包括晶体结构涉及三角形图案的材料，以促进挫败感，包括烧绿石（共享角的四面体）、Kagome 和堆叠的三角形晶格。我们将探讨单离子特性在选择磁性基态和自旋激发性质中的作用。我们将继续我们的计划，识别和表征表现出破缺时间反转对称性或各向异性配对状态的非常规超导体，这可能表明拓扑非平凡状态的存在，这可能对未来的量子计算机有用。 拟议的研究将涉及广泛的实验技术，从使用光学图像和电三弧炉的材料合成开始。我们将测量低至 0.5K 的交流和直流磁化率（加拿大独有的能力）。我们将利用 TRIUMF 的一系列新设施，包括 CFI 资助的新型高能 μ 子束，利用 μ 子自旋旋转/弛豫的体积敏感技术来测量材料的局部真实空间磁特性。我们将使用中子散射来测量相应的倒易空间磁特性和激励。我们将在 TRIUMF 的 ISAC 设施中开发并应用 Beta 检测核磁共振技术，该技术的可用波束时间很快将增加三倍。该研究计划将带来对量子材料的新理解，识别物质的新电子态和紧急激发。随着学生的职业发展，通过这项研究，学生将接受该领域最前沿的培训。