Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal

doi:10.1038/s41567-018-0234-5

	Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal
	Liu, Enke 1,2; Sun, Yan 1; Kumar, Nitesh 1; Muechler, Lukas 3; Sun, Aili 1; Jiao, Lin 1; Yang, Shuo-Ying 4; Liu, Defa 4; Liang, Aiji5,6 ; Xu, Qiunan 1; Kroder, Johannes 1; Suess, Vicky 1; Borrmann, Horst 1; Shekhar, Chandra 1; Wang, Zhaosheng 7; Xi, Chuanying 7; Wang, Wenhong 2; Schnelle, Walter 1; Wirth, Steffen 1; Chen, Yulin5,8 ; Goennenwein, Sebastian T. B.9; Felser, Claudia 1
	2018-11
发表期刊	NATURE PHYSICS
ISSN	1745-2473
卷号	14 期号:11 页码:1125-+
发表状态	已发表
DOI	10.1038/s41567-018-0234-5
摘要	Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a magnetic Weyl semimetal candidate, Co3Sn2S2, with a quasi-two-dimensional crystal structure consisting of stacked kagome lattices. This lattice provides an excellent platform for hosting exotic topological quantum states. We observe a negative magnetoresistance that is consistent with the chiral anomaly expected from the presence of Weyl fermions close to the Fermi level. The anomalous Hall conductivity is robust against both increased temperature and charge conductivity, which corroborates the intrinsic Berry-curvature mechanism in momentum space. Owing to the low carrier density in this material and the considerably enhanced Berry curvature from its band structure, the anomalous Hall conductivity and the anomalous Hall angle simultaneously reach 1,130 Omega(-1) cm(-1) and 20%, respectively, an order of magnitude larger than typical magnetic systems. Combining the kagome-lattice structure and the long-range out-of-plane ferromagnetic order of Co3Sn2S2, we expect that this material is an excellent candidate for observation of the quantum anomalous Hall state in the two-dimensional limit.
收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	National Natural Science Foundation of China[51722106]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000448973100019
出版者	NATURE PUBLISHING GROUP
EI入藏号	20190806529064
WOS关键词	ANTIPEROVSKITES ; FERMIONS ; STATE
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/28293
专题	物质科学与技术学院_特聘教授组_陈宇林
通讯作者	Liu, Enke; Sun, Yan; Felser, Claudia
作者单位	1.Max Planck Inst Chem Phys Solids, Dresden, Germany 2.Chinese Acad Sci, Inst Phys, Beijing, Peoples R China 3.Princeton Univ, Dept Chem, Princeton, NJ 08544 USA 4.Max Planck Inst Microstruct Phys, Halle, Germany 5.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai, Peoples R China 6.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA USA 7.Chinese Acad Sci, High Field Magnet Lab, Hefei, Anhui, Peoples R China 8.Univ Oxford, Dept Phys, Clarendon Lab, Oxford, England 9.Tech Univ Dresden, Inst Festkorper & Mat Phys, Dresden, Germany
推荐引用方式 GB/T 7714	Liu, Enke,Sun, Yan,Kumar, Nitesh,et al. Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal[J]. NATURE PHYSICS,2018,14(11):1125-+.
APA	Liu, Enke.,Sun, Yan.,Kumar, Nitesh.,Muechler, Lukas.,Sun, Aili.,...&Felser, Claudia.(2018).Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal.NATURE PHYSICS,14(11),1125-+.
MLA	Liu, Enke,et al."Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal".NATURE PHYSICS 14.11(2018):1125-+.