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: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=688378
• 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.*****

这个提案是为了支持我在量子材料实验研究方面的研究项目。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状态相对应的新特性，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。******我的研究项目是跨学科的，涉及物理学家、化学家和材料科学家。它也是高度合作的，包括国际领先的科学家和研究生和本科生阶段的所有阶段的研究。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，包括美国科学学会3月份的会议，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激发的出现。这些系统将包括晶体结构包含三角形图案的材料，以促进挫折感，包括焦绿石（共用角的四面体）、Kagome和堆叠的三角形晶格。我们将探讨单离子性质在选择磁基态和自旋激发性质中的作用。******我们将继续我们的计划，以识别和表征非常规超导体表现出破时间反转对称或各向异性配对状态，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。我们将测量交流和直流磁化率低至0.5K（加拿大独有的能力）。我们将使用体积敏感的介子自旋/弛豫技术来测量材料的局部真实空间磁性，使用TRIUMF的一系列新设备，包括新的cfi资助的高能介子束。我们将使用中子散射来测量相应的互易空间磁性和激发。我们将在TRIUMF的ISAC设施中开发和应用β探测核磁共振技术，在那里，可用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，确定物质的新电子状态和紧急激发。通过这项研究，学生将在这一领域的前沿培养他们的职业发展。*****