CAREER: Synthetic design of structure-inspired magnetic topological materials

职业：受结构启发的磁性拓扑材料的综合设计

• 批准号: 2343536
• 负责人: Nirmal Ghimire
• 金额: $ 56.37万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2027-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2343536&HistoricalAwards=false
• 关键词: CAREER; Synthetic; design; structure; inspired

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2.NON-TECHNICAL DESCRIPTIONMost modern-day computers and microelectronics make use of the semiconductor silicon, which exploits the electron’s charge to store, transmit, and process information. Although silicon has been instrumental in technological advancements over the last several decades, use of the electron’s intrinsic spin, in addition to its charge, holds promise for thinner, faster and more energy efficient devices. A grand challenge, however, lies in the design and discovery of materials that allow the interplay between charge and spin to yield properties whose whole is greater than the sum of its parts. The research objective of this project is to design, synthesize and study materials where the underlying crystal structure plays crucial role in providing the platform for this coupling between charge and spin as a platform that can potentially shape future technologies, such as spin-based electronics (spintronics) or quantum computing. Integrated with the research efforts, the education goal of this project is to bring materials synthesis and characterization to students and the broader community in the greater DC-Maryland-Virginia (DMV) area through multiple channels: recruitment of both undergraduate and graduate students from underrepresented groups; curriculum development in quantum materials; and workshop organization on materials synthesis and characterization for undergraduate and graduate students. The project also aspires to engage high school students—who generally do not see science career paths represented in their communities—in research through existing K-12 programs at GMU, such as the Aspiring Scientists Summer Internship Program and the GMU STEM Accelerator Program. TECHNICAL DESCRIPTION Finding and understanding emergent phenomena arising due to the combined effect of electron correlations and electronic topology is a major goal of the contemporary condensed matter physics. The research goal of this project is to design, discover and investigate a cross-section of quantum matter with the unifying principle of degeneracy breaking in either the real or reciprocal space mediated by the crystal structure of the materials. Specifically, the project concentrates on: 1) synthesizing and studying by means of magnetotransport measurements a specific class of kagome lattice magnets that provide a unique platform for the interplay of topological properties arising both in the real and the momentum space, and 2) synthesizing and providing experimental validation of recently proposed collinear antiferromagnets which, by virtue of the crystalline symmetry, give rise to the properties expected in ferromagnets but without the net magnetization and without the requirement of spin-orbit coupling. As such, this project aims to advance the fundamental understanding of the interplay between electronic topology and complex magnetism, and the interplay between simple magnetic ordering and the crystal structure. Its ultimate goal is to synthesize materials that can shape future technology and quantum information science through the emergent phenomena these materials harbor. Such properties are applicable for spintronics, dissipationless electronics and quantum computing. Integrated with the research efforts, the education goal of this project is to bring materials synthesis and characterization to students and the broader community in the greater DC-Maryland-Virginia (DMV) area through multiple channels: recruitment of both undergraduate and graduate students from underrepresented groups; curriculum development in quantum materials; and workshop organization on materials synthesis and characterization for undergraduate and graduate students. The project also aspires to engage high school students—who generally do not see science career paths represented in their communities—in research through existing K-12 programs at GMU, such as the Aspiring Scientists Summer Internship Program and the GMU STEM Accelerator Program.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.

该奖项的全部或部分资金来自《2021年美国救援计划法案》(公共法律117-2)。大多数现代计算机和微电子学都使用半导体硅，它利用电子的电荷来存储、传输和处理信息。尽管在过去的几十年里，硅在技术进步中发挥了重要作用，但利用电子的本征自旋，加上它的电荷，有望制造出更薄、更快、更节能的设备。然而，一个巨大的挑战在于设计和发现允许电荷和自旋之间相互作用的材料，以产生整体大于部分之和的性质。该项目的研究目标是设计、合成和研究材料，其中潜在的晶体结构在提供电荷和自旋之间的耦合平台方面发挥关键作用，作为一个可能塑造未来技术的平台，如基于自旋的电子学(自旋电子学)或量子计算。与研究工作相结合，该项目的教育目标是通过多种渠道将材料合成和表征带给华盛顿-马里兰州-弗吉尼亚州(DMV)地区的学生和更广泛的社区：从代表性不足的群体中招聘本科生和研究生；量子材料课程开发；以及为本科生和研究生组织关于材料合成和表征的研讨会。该项目还渴望通过GMU现有的K-12项目，如有抱负的科学家暑期实习计划和GMU STEM加速器计划，让高中生--他们通常看不到他们所在社区的科学职业道路--参与研究。技术描述、发现和理解由于电子关联和电子拓扑的共同作用而产生的涌现现象是当代凝聚态物理学的主要目标。这个项目的研究目标是设计、发现和研究量子物质的横截面，其简并破坏的统一原理是由材料的晶体结构在实空间或倒易空间中进行调节。具体地说，该项目集中在：1)通过磁传输测量来合成和研究一类特殊的Kagome晶格磁体，它为在真实空间和动量空间中产生的拓扑性质的相互作用提供了一个独特的平台，以及2)合成并提供了最近提出的共线反铁磁体的实验验证，由于晶体的对称性，它产生了预期的铁磁体的性质，但没有净磁化和自旋-轨道耦合的要求。因此，这个项目的目的是促进对电子拓扑和复磁性之间的相互作用以及简单磁性有序和晶体结构之间的相互作用的基本理解。它的最终目标是通过这些材料所蕴含的新兴现象，合成能够塑造未来技术和量子信息科学的材料。这些性质适用于自旋电子学、无耗散电子学和量子计算。与研究工作相结合，该项目的教育目标是通过多种渠道将材料合成和表征带给华盛顿-马里兰州-弗吉尼亚州(DMV)地区的学生和更广泛的社区：从代表性不足的群体中招聘本科生和研究生；量子材料课程开发；以及为本科生和研究生组织关于材料合成和表征的研讨会。该项目还渴望通过GMU现有的K-12计划，如有抱负的科学家暑期实习计划和GMU STEM加速器计划，吸引高中生--他们通常看不到他们所在社区的科学职业道路--参与研究。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。