Ab-initio discovery of high-temperature topological magnetic materials

高温拓扑磁性材料的从头开始发现

• 批准号: 448880005
• 负责人: Professor Dr. Yuriy Mokrousov
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/448880005?language=en
• 关键词: Ab; initio; discovery; temperature; topological

Since the initial discovery of topological insulators, a plethora of topological electronic phases was uncovered, guided by theoretical design and materials research. While among topological materials, a subclass of magnetic materials is perhaps the most exciting outlet for novel ideas in the field, the progress in realization of various time-reversal broken topological phases has been so far quite slow. This can be associated with the fact that optimal magnetic materials which exhibit stable magnetism and stable quantized magneto-transport properties at high temperatures have not been designed to date. With our consortium project - which is a closely entangled Sino-German effort comprising Wanxiang Feng and Yugui Yao as PIs of the Beijing team, and Yuriy Mokrousov and Jairo Sinova as PIs of the Mainz team - we will address this challenge. With the help of theoretical tools that the consortium has accumulated and will develop further, we will aim at a theoretical discovery of novel magnetic topological materials which have optimized properties in terms of their electronic structure and critical temperatures. We will predict a variety of topological phases that can arise in topological magnets and suggest the means of their characterization in terms of known and novel linear and non-linear transport effects sensitive to the interplay of symmetry, topology, structural and magnetic chirality, and thermal fluctuations. We will draw a general picture of the emergence and behavior of complex topological phases in magnetic materials at high temperatures, thereby making a qualitative leap forward in the area of topological spintronics, and laying a foundation for experimental exploration of topological magnetism.

自拓扑绝缘体首次发现以来，在理论设计和材料研究的指导下，发现了大量的拓扑电子相。虽然在拓扑材料中，磁性材料的一个子类可能是该领域新思想最令人兴奋的出口，但到目前为止，实现各种时间反演破缺拓扑相的进展相当缓慢。这可能与以下事实有关：迄今为止尚未设计出在高温下表现出稳定磁性和稳定的量子化磁输运性质的最佳磁性材料。通过我们的联盟项目-这是一个紧密联系在一起的中德合作项目，包括北京团队的PI冯万祥和Yugui Yao，以及美因茨团队的PI Yuriy Mokrousov和Jairo Sinova-我们将应对这一挑战。借助该联盟已经积累并将进一步发展的理论工具，我们的目标是从理论上发现在电子结构和临界温度方面具有优化性能的新型磁性拓扑材料。我们将预测各种拓扑相，可以出现在拓扑磁体，并建议其表征的手段，在已知的和新颖的线性和非线性传输效应敏感的对称性，拓扑结构，结构和磁手性的相互作用，和热波动。我们将勾勒出高温下磁性材料中复杂拓扑相的出现和行为的概貌，从而在拓扑自旋电子学领域实现质的飞跃，为拓扑磁性的实验探索奠定基础。