New Frontiers in Magnetic Quantum Materials

磁性量子材料的新领域

• 批准号: RGPIN-2020-04660
• 负责人: Hallas, Alannah
• 金额: $ 2.84万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=762988
• 关键词: New; Frontiers; Magnetic; Quantum; Materials

The eras in human history are named for the materials that defined them, from the bronze age, to the iron age, to the current silicon age. We may now be at the precipice of the age of quantum materials. Quantum materials have remarkable structural, electrical, and magnetic properties derived from intense quantum mechanical effects. Just as silicon-based technologies revolutionized almost all aspects of life over the last half century, quantum materials have the potential to revolutionize a wide range of fields, from computing (quantum computing with Majorana modes), to medicine (ultra-sensitive sensors for neurology applications), to transportation (high-performance supercapacitor electrodes to extend the range of electric vehicles). The overarching aim of this research program is to discover new quantum materials and establish structure-function relationships that will accelerate progress towards unlocking new technologies. In parallel with these scientific impacts, this research program will also provide training to graduate students and postdocs who will be ideally equipped to work in emerging industries based on quantum materials. The core of my research program at the University of British Columbia is an interdisciplinary approach to the design, synthesis, and characterization of new quantum materials using state-of-the-art crystal growth techniques. In addition to solid state and flux growth, our group will be the first in Canada operating a high-pressure multi-anvil apparatus for quantum materials research. This apparatus will allow us to synthesize materials under extreme conditions: pressures up to 250,000 times atmospheric pressure and temperatures up to 3000 C. We will also operate a suite of floating zone image furnaces, including Canada's first laser diode image furnace, that will be used to grow pristine, large single crystals. This unique and comprehensive set of crystal growth capabilities will enable the discovery of new materials that were formerly unobtainable due to synthetic barriers. We then characterize the magnetic and electronic properties of these new quantum materials using a suite of in-house (susceptibility, heat capacity and resistivity) and facility-based (neutron scattering and muon spin relaxation) techniques. In the next five years, this research program will focus on emerging topics where materials innovations are poised to have the most significant impact. The first of these considers the unification of two of the most important classes of quantum materials: strongly correlated metals and frustrated magnets, each of which has independently yielded remarkable new states of matter. We will establish a materials foundation to explore the burgeoning topic of metallic frustration. The second theme, magnetic high entropy oxides, will be used to explore magnetism in the limit of extreme disorder. These magnetic high entropy oxides exhibit tremendous promise for applications such as multiferroic functionality.

人类历史上的时代是以定义它们的材料命名的，从青铜时代到铁器时代，再到当前的硅时代。我们现在可能正处于量子材料时代的边缘。量子材料具有源自强烈量子力学效应的显着结构、电学和磁学特性。正如硅基技术在过去半个世纪彻底改变了生活的几乎所有方面一样，量子材料也有可能彻底改变广泛的领域，从计算（马约拉纳模式的量子计算）到医学（用于神经学的超灵敏传感器）应用）到交通（高性能超级电容器电极，以扩展电动汽车的行驶里程）。该研究计划的总体目标是发现新的量子材料并建立结构-功能关系，从而加速解锁新技术的进展。在这些科学影响的同时，该研究项目还将为研究生和博士后提供培训，他们将具备在基于量子材料的新兴行业工作的理想条件。 我在不列颠哥伦比亚大学的研究项目的核心是采用跨学科方法，利用最先进的晶体生长技术来设计、合成和表征新的量子材料。除了固态和通量生长之外，我们的团队将成为加拿大第一个使用高压多砧设备进行量子材料研究的团队。该设备将使我们能够在极端条件下合成材料：压力高达大气压的 250,000 倍，温度高达 3000°C。我们还将运行一套浮区图像炉，包括加拿大第一台激光二极管图像炉。生长原始的大单晶。这套独特且全面的晶体生长能力将使人们能够发现以前由于合成障碍而无法获得的新材料。然后，我们使用一套内部（磁化率、热容和电阻率）和基于设施的（中子散射和μ子自旋弛豫）技术来表征这些新量子材料的磁性和电子特性。 在未来五年中，该研究计划将重点关注材料创新有望产生最重大影响的新兴主题。第一个考虑了两类最重要的量子材料的统一：强相关金属和受挫磁体，每种材料都独立地产生了显着的新物质态。我们将建立一个材料基础来探索金属挫败这个新兴的话题。第二个主题是磁性高熵氧化物，将用于探索极端无序极限下的磁性。这些磁性高熵氧化物在多铁功能等应用中表现出巨大的前景。