Magnetic Textures and Dynamics in Magnetic Weyl Semimetals
Magnetic Textures and Dynamics in Magnetic Weyl Semimetals
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DOI：
10.1002/andp.201900287
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发表时间：
2019-10-14
影响因子：
2.4
通讯作者：
Araki, Yasufumi
中科院分区：
文献类型：
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作者：
Araki, Yasufumi
近期的理论和实验尝试成功地发现了磁性外尔半金属相，其在电子能带中呈现出节点结构以及磁序。除了均匀的铁磁或反铁磁序之外，非均匀的磁结构，如畴壁和斯格明子，在这类材料中进一步丰富了外尔电子的性质。在此，对这些磁性外尔半金属中外尔电子和磁结构之间的相互作用进行了专题综述。首先回顾了非拓扑磁性金属中磁结构的基础知识，然后结合近期在这方面的理论和实验进展，讨论了磁结构在在外尔半金属中的影响。指出了虚拟“轴矢规范场”的概念，它有效地描述了磁结构对外尔电子的影响，并且能够很好地解释磁畴壁周围局域电子的性质。
Recent theoretical and experimental attempts have been successful in finding magnetic Weyl semimetal phases, which show nodal-point structure in the electronic bands as well as magnetic orders. Beyond uniform ferromagnetic or antiferromagnetic orders, nonuniform magnetic textures, such as domain walls and skyrmions, enrich the properties of the Weyl electrons even more in such materials. Here, a topical review on interplay between Weyl electrons and magnetic textures in those magnetic Weyl semimetals is given. The basics of magnetic textures in nontopological magnetic metals are reviewed first, and then the effect of magnetic textures in Weyl semimetals is discussed, regarding the recent theoretical and experimental progress therein. The idea of the fictitious "axial gauge fields" is pointed out, which effectively describes the effect of magnetic textures on the Weyl electrons and can well account for the properties of the electrons localized around magnetic domain walls.