磁性拓扑半金属的磁场调控及面间输运研究

磁性拓扑半金属中磁性与拓扑的相互作用，能够诱导出诸如轴子绝缘体、量子反常霍尔效应、大内禀反常霍尔效应、奇异角磁阻等新奇拓扑量子现象，是近年来凝聚态物理的前沿研究热点。然而，目前所发现的磁性拓扑半金属种类稀少，限制了相关研究的深入开展。因此，发掘更多的磁性拓扑半金属，并通过外场调控等手段来研究其中的奇异拓扑态及相应的微观物理机制，对该领域的进一步发展至关重要。针对上述问题，本项目以含磁性元素的112或122半金属材料为研究对象，拟开展以下研究：1.探索新型磁性拓扑半金属，丰富磁性拓扑半金属材料体系；2.通过外场调控研究磁有序和拓扑态耦合的微观机制；3.利用面间输运测量费米面的各向异性，探索被传统面内输运所忽视的拓扑输运性质。本项目的顺利实施将丰富磁性拓扑半金属的研究体系，加深对磁性与拓扑相互作用机制的认识，并推动该领域的进一步发展。

The study on magnetic topological semimetals is a hot topic in condensed matter physics in recent years. The interplay of magnetism and topology in magnetic topological semimetals can lead to various interesting topological quantum phenomena, such as axion insulator, quantum anomalous Hall effects, large intrinsic anomalous Hall effects, and singular angular magnetoresistance. However, there are only a few magnetic topological semimetals discovered at present, which limits its further study. Therefore, it is important to explore more magnetic topological semimetals, and study their magnetically controllable physical phenomena and related physical mechanism, which can significantly guide the advancement of this field. Aiming at the problems above, we will study the magnetic semimetals in 112 and 122 family in this project, and plan to perform the following investigation: 1. We will explore new magnetic topological semimetals to enrich the magnetic topological semimetal family; 2. We will study the micromechanism of the coupling between the magnetic order and topological state; 3. We will study the anistropic Fermi surface using interlayer transport measurement, and explore the topological transport properties which is ignored in the traditional in-plane measurement. The project will enrich the number of magnetic topological semimetals, deepen our understanding of the interplay between the magnetism and topology, and promote further development of this field.