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.

该建议在量子材料实验研究中寻求我的研究计划的支持。这些材料很重要，因为它们挑战了传统理论，并展示了与新的物质新兴电子状态相对应的新型特性，这些物质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QUBITS。我的研究计划本质上是跨学科的，涉及物理学家，化学家和物质科学家。它也是高度合作的，在研究的各个阶段都涉及国际领先的科学家以及研究生和本科阶段。我的学生将成为各种高级实验技术的专家，从而为他们提供了可转让技能，他们将能够在行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 3月会议以及主题会议和暑期学校。我的研究的长期目标是发现，合成和理解具有新型特性的新量子材料。我和我的小组将继续发展并表征新的磁系统，在这些磁系统中，几何挫败感或低维度导致新型激发的出现。这些系统将包括其晶体结构涉及三角基序的材料，以促进挫败感，包括pyrochlore（转角共享的四面体），kagome和堆叠的三角形晶格。我们将探讨单个离子特性在选择磁场状态和自旋激发的性质中的作用。我们将继续我们的计划，以识别和表征非常规的超导体，这些超导体表现出破裂的时间逆向对称性或各向异性配对状态，这些状态可能表明存在可能对未来量子计算机有用的拓扑上的非平凡状态。 拟议的研究将涉及多种实验技术，从使用光学图像和电气三ARC熔炉材料合成开始。我们将AC和DC磁化率降低到0.5K（加拿大独特的能力）。我们将使用MUON自旋旋转/松弛的体积敏感技术，以使用Triumf的一系列新设施（包括新的CFI资助的高能MUON光束）来测量材料的局部真实空间磁性。我们将使用中子散射来测量相应的相互空间磁性和激发。我们将在Triumf的ISAC设施中开发并应用β检测的核磁共振技术，在此，可用的光束时间将很快增加三倍。该研究计划将导致对量子材料的新理解，从而确定物质的新电子状态和新兴的激发。随着他们的职业发展，学生将在该领域的最前沿进行培训。