Quantum criticality and frustrated spin systems

量子临界性和受挫自旋系统

• 批准号: RGPIN-2020-04893
• 负责人: Mun, Eundeok
• 金额: $ 2.48万
• 依托单位: Simon Fraser 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=717447
• 关键词: Quantum; criticality; frustrated; spin; systems

Much of modern technology, such as computer hard drives and Universal Serial Bus (USB) flash drives, is based on knowledge of condensed matter physics and materials science and the discovery of new materials and their properties. The discovery of new materials with interesting new properties may allow for more cost-effective and reliable devices. Materials synthesis lays the foundation for all other research in condensed matter physics, and materials are the linchpin for technologies ranging from the energy sector, to medical devices, to sensing, communications and information technologies. The development of next generation devices requires ceaseless exploration of new materials with design principles of multi-functional systems that possess the desired electric and magnetic properties. Discovering new quantum behavior has often been the outcome of ventures into unexplored territory with the synthesis of a new material. My research program on the growth and characterization of novel materials has the potential to significantly impact progress in this area. The proposed research program explores new quantum materials with potentially beneficial properties. The primary emphasis is on the discovery, synthesis, characterization and understanding of new classes of quantum materials. To find quantum spin-liquid states in metals, non-trivial topological states in magnetic materials, and other desirable quantum states, the research targets specific types of compounds in which the magnetic transition-metal and rare-earth ions occupy frustrated lattice geometries. My research will make important progress on these problems by focusing on a particularly clean set of model materials, in which “quantum criticality and frustrated magnetism in metals" can be exploited to tune the balance between kinetic and potential energy in a controlled way. This has the potential to reveal useful and interesting new electronic states, and will allow us to carefully test and extend our understanding of strongly interacting electron systems. The proposed program will capitalize on our achievements and collaborations, and continue to set new directions in this field. At the same time, my research program will provide an outstanding training environment for highly qualified personnel, who will become tomorrow's leaders in this area.

许多现代技术，如计算机硬盘驱动器和通用串行总线(USB)闪存驱动器，都是基于凝聚态物理和材料科学的知识，以及新材料及其特性的发现。具有有趣的新特性的新材料的发现可能会带来更具成本效益和更可靠的设备。材料合成为凝聚态物理的所有其他研究奠定了基础，而材料是从能源部门到医疗设备，再到传感、通信和信息技术等技术的关键。下一代器件的发展需要不断探索新材料，设计原则是具有所需的电磁性能的多功能系统。 发现新的量子行为通常是通过合成一种新材料进入未知领域的冒险的结果。我的关于新材料生长和表征的研究计划有可能对这一领域的进展产生重大影响。拟议的研究计划探索具有潜在有益性质的新量子材料。主要的重点是新型量子材料的发现、合成、表征和理解。为了找到金属中的量子自旋-液态态，磁性材料中的非平凡拓扑态，以及其他理想的量子态，这项研究瞄准了特定类型的化合物，其中磁性过渡金属和稀土离子占据了受挫的晶格几何形状。通过专注于一套特别干净的模型材料，我的研究将在这些问题上取得重要进展。在这一模型材料中，可以利用“金属中的量子临界性和受挫磁性”，以受控的方式调整动能和势能之间的平衡。这有可能揭示有用和有趣的新电子态，并使我们能够仔细测试和扩展我们对强相互作用电子系统的理解。拟议中的计划将利用我们的成果和合作，并继续在该领域设定新的方向。同时，我的研究计划将为高素质的人员提供一个出色的培训环境，他们将成为该领域的明天的领导者。