Optical study of the three-dimensional Weyl semimetal Mn3 Sn

doi:10.1103/PhysRevB.108.235109

	Optical study of the three-dimensional Weyl semimetal Mn3 Sn
	Cao, L.Y.1; Xu, Z.A.2 ; Gao, B.X.1; Wang, L.1; Zhang, X.T.1; Zhang, X.Y.1; Guo, Y.F.2,3 ; Chen, R.Y.1
	2023-12-15
发表期刊	PHYSICAL REVIEW B (IF:3.2[JCR-2023],3.3[5-Year])
ISSN	2469-9950
EISSN	2469-9969
卷号	108 期号:23
DOI	10.1103/PhysRevB.108.235109
摘要	The three-dimensional Weyl semimetal Mn3Sn has attracted tremendous attention due to its great application potential. However, the complex magnetic structures at different temperature intervals make it extremely difficult to unravel the underlying electronic structures of Mn3Sn. Here, we perform temperature-dependent optical spectroscopy measurements on single-crystalline Mn3Sn to investigate its charge dynamics. We find that both the optical reflectivity R(ω) and conductivity σ1(ω) evolve very smoothly across the magnetic phase transition at TM=285 K, where the giant anomalous Hall effect (AHE) at room temperature drops significantly. Furthermore, linearly increasing segments of σ1(ω) are observed in the whole temperature range from 300 K to 10 K, indicating that the existence of Weyl fermions is very robust against the magnetic phase transition. In addition, the Weyl points closest to the Fermi level EF are identified to be located about 101 meV away from EF at 10 K, and the associated Fermi velocity is about 2.50×107 cm/s. Our results reveal that the phase transition at TM only generates subtle modification to the band structure, which helps to further uncover the mechanism of the dramatic change of AHE in Mn3Sn. © 2023 American Physical Society.
关键词	Electronic structure Manganese alloys Tin alloys Anomalous hall effects Charge dynamics Electronic.structure Magnetic-phase transition Optical spectroscopy Optical study Single-crystalline Spectroscopy measurements Temperature dependent Temperature intervals
URL	查看原文
收录类别	EI
语种	英语
出版者	American Physical Society
EI入藏号	20235015222338
EI主题词	Binary alloys
EI分类号	543.2 Manganese and Alloys ; 546.2 Tin and Alloys
原始文献类型	Journal article (JA)
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/348640
专题	物质科学与技术学院物质科学与技术学院_PI研究组_郭艳峰组物质科学与技术学院_博士生
作者单位	1.Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing; 100875, China 2.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China 3.ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai; 201210, China
推荐引用方式 GB/T 7714	Cao, L.Y.,Xu, Z.A.,Gao, B.X.,et al. Optical study of the three-dimensional Weyl semimetal Mn3 Sn[J]. PHYSICAL REVIEW B,2023,108(23).
APA	Cao, L.Y..,Xu, Z.A..,Gao, B.X..,Wang, L..,Zhang, X.T..,...&Chen, R.Y..(2023).Optical study of the three-dimensional Weyl semimetal Mn3 Sn.PHYSICAL REVIEW B,108(23).
MLA	Cao, L.Y.,et al."Optical study of the three-dimensional Weyl semimetal Mn3 Sn".PHYSICAL REVIEW B 108.23(2023).