LEAPS-MPS: Tailoring Magnetic Topological Phases in Rare-earth based Kagome Materials

该奖项全部或部分由《2021年美国救援计划法案》（公法117-2）资助。非技术描述所谓的量子材料，包括“稀土基”材料，在高速计算、清洁能源、汽车和国防工业等重要技术中发挥着关键作用，具有独特的性能。因此，重要的是要清楚地了解这些材料的关键特性，以便利用它们的各种应用。本项目实现了稀土复合型材料的定向设计。除了对快速崛起的国际科学和工业领域产生根本性影响的令人兴奋的机会之外，这项研究还为学生建立并维持了一个多学科，以团队为导向的解决问题的学习环境。这项研究提供了实践研究经验的机会，特别是对于代表性不足的少数民族，女性和纽约州立大学布法罗分校的第一代大学生，这些学生中有很大一部分得不到充分服务。技术描述理解拓扑，磁性和相关性之间的相互作用是新兴的研究，可以潜在地发现具有异常拓扑霍尔效应，陈氏拓扑磁性和异常压力诱导拓扑相变的奇异拓扑稀土材料。研究重点是：(i)通过设计和合成基于4f的系统，通过载流子可调性发现新的磁激发拓扑相；（ii）揭示缺陷，结构和成分变化在所提出材料电子结构中的作用，重点是独特的磁输运，异常和量子霍尔效应，以及电子结构随温度，压力和磁相的演变。本研究涉及块状单晶材料的合成，然后对其进行晶体学、磁性、电学、热力学、微观结构和光谱表征。这项拟议的研究和教育活动也为未来的STEM劳动力招募和留住学生，特别是代表性不足的少数民族、女性和第一代大学生，提供了一个极好的机会。该项目旨在培训至少五名本科生，并在资助期间为K-12学生准备和完善活动。拟议的活动为STEM学生创造了很好的机会，让他们在职业生涯中追求突破性的道路。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2).Non-Technical DescriptionThe so-called quantum materials including “rare-earth-based” materials possess unique properties for critical roles in important technologies like high-speed computation, clean energy, automotive, and defense industries. It is therefore important to clearly understand the key properties of these materials in order to harness them for the various applications. This project enables targeted design of rare-earth kagome materials with multiple functionalities. Beyond the exciting opportunity for a fundamental impact on a rapidly emerging international scientific and industrial field, this research also establishes and sustains a multidisciplinary, team-oriented problem-solving learning environment for students. This research provides the opportunity for hands-on research experiences, particularly for underrepresented minorities, women, and first-generation College students at SUNY College at Buffalo with a large percentage of these underserved students. Technical DescriptionUnderstanding the interplay between topology, magnetism, and correlation is emergent research that can potentially find exotic topological rare earth materials with anomalous topological Hall effect, Chern topological magnetism, and unusual pressure-induced topological phase transitions. The research focuses on (i) discovering new magnetically inspired topological phases by carrier-tunability via the design and synthesis of 4f -based systems and (ii) revealing the role of defects, structural and compositional variations in the electronic structures of the proposed materials with an emphasis on unique magneto-transport, anomalous and quantum Hall effect, and evolution of electronic structures with temperature, pressure, and magnetic phases. This research involves synthesis of bulk single-crystalline materials, then their crystallographic, magnetic, electrical, thermodynamic, microstructural, and spectroscopic characterization. This proposed research and education activities also provide an excellent opportunity to recruit and retain students for the future STEM workforce, particularly underrepresented minorities, women, and first-generation college students. The project aims to train at least five undergraduate students and prepare and refine activities for K-12 students during the funding period. Proposed activities create great opportunities for STEM students to pursue ground-breaking pathways in their careers.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.