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Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal

文献类型：期刊论文

作者Liu, Enke2,3; Sun, Yan2; Kumar, Nitesh2; Muechler, Lukas1; Sun, Aili2; Jiao, Lin2; Yang, Shuo-Ying4; Liu, Defa4; Liang, Aiji5,6; Xu, Qiunan2
刊名NATURE PHYSICS
出版日期2018-11-01
卷号14期号:11页码:1125-+
ISSN号1745-2473
DOI10.1038/s41567-018-0234-5
通讯作者Liu, Enke(ekliu@iphy.ac.cn) ; Sun, Yan(yan.sun@cpfs.mpg.de) ; Felser, Claudia(Claudia.Felser@cpfs.mpg.de)
英文摘要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.
WOS关键词MAGNETIC TOPOLOGICAL INSULATORS ; ROOM-TEMPERATURE ; QUANTUM MATERIALS ; ANTIFERROMAGNET ; ANTIPEROVSKITES ; FERMIONS ; STATES ; SN
资助项目European Research Council (ERC) Advanced Grant[291472] ; ERC Advanced Grant[742068] ; Alexander von Humboldt Foundation of Germany ; National Natural Science Foundation of China[51722106]
WOS研究方向Physics
语种英语
WOS记录号WOS:000448973100019
出版者NATURE PUBLISHING GROUP
资助机构European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; European Research Council (ERC) Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; ERC Advanced Grant ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; Alexander von Humboldt Foundation of Germany ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/40105]  
专题合肥物质科学研究院_中科院强磁场科学中心
通讯作者Liu, Enke; Sun, Yan; Felser, Claudia
作者单位1.Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
2.Max Planck Inst Chem Phys Solids, Dresden, Germany
3.Chinese Acad Sci, Inst Phys, Beijing, Peoples R China
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-+.

入库方式： OAI收割

来源：合肥物质科学研究院

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