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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=716012
• 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.

该提案旨在支持我在量子材料实验研究方面的研究计划。 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特性，这些新特性可能成为下一代技术的基础，例如用于MRI的高场磁体或用于量子计算的量子比特。 我的研究计划是跨学科的性质，涉及物理学家，化学家和材料科学家。 它也是高度合作的，涉及国际领先的科学家和研究生和本科阶段的研究的所有阶段。 我的学生将成为各种先进实验技术的专家，为他们提供可转移的技能，他们将能够在工业和学术研究环境中应用。我的学生将在国际会议上介绍他们的研究，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，合成和理解具有新特性的新量子材料。我和我的团队将继续发展和描述新的磁系统，其中几何挫折或低维度导致新的激励出现。 这些系统将包括晶体结构涉及三角形图案的材料，以促进挫折，包括烧绿石（角共享四面体），戈薇和堆叠的三角形晶格。 我们将探讨在选择磁基态和自旋激发的性质的单离子属性的作用。 我们将继续我们的计划，以确定和表征非常规超导体表现出破缺的时间反演对称性或各向异性配对状态，这可能表明存在拓扑非平凡状态，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（这是加拿大独有的能力）。 我们将使用体积敏感的μ子自旋旋转/弛豫技术来测量材料的局部真实的空间磁特性，使用的是TRIUMF的一系列新设施，包括一个新的CFI资助的高能μ子束。 我们将使用中子散射来测量相应的倒易空间磁性和激发。 我们将在TRIUMF的ISAC设施开发和应用β探测核磁共振技术，不久将可将可用束流时间增加三倍。 该研究计划将导致对量子材料的新理解，识别物质的新电子状态和紧急激发。 学生将在这个领域的最前沿接受培训，因为他们的职业生涯通过这项研究发展。