Institutional Repository of Chinese Acad Sci, High Field Magnet Lab,Hefei 230031, Anhui, Peoples R China
Giant anomalous Hall effect in a ferromagnetic kagome-lattice semimetal | |
Liu, Enke1,2; Sun, Yan1; Kumar, Nitesh1; Muechler, Lukas3; Sun, Aili1; Jiao, Lin1; Yang, Shuo-Ying4; Liu, Defa4; Liang, Aiji5,6; Xu, Qiunan1; Kroder, Johannes1; Suess, Vicky1; Borrmann, Horst1; Shekhar, Chandra1; Wang, Zhaosheng7; Xi, Chuanying7; Wang, Wenhong2; Schnelle, Walter1; Wirth, Steffen1; Chen, Yulin5,8; Goennenwein, Sebastian T. B.9; Felser, Claudia1 | |
2018-11-01 | |
发表期刊 | NATURE PHYSICS |
ISSN | 1745-2473 |
通讯作者 | Liu, Enke(ekliu@iphy.ac.cn) ; Sun, Yan(yan.sun@cpfs.mpg.de) ; Felser, Claudia(Claudia.Felser@cpfs.mpg.de) |
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. |
DOI | 10.1038/s41567-018-0234-5 |
关键词[WOS] | MAGNETIC TOPOLOGICAL INSULATORS ; ROOM-TEMPERATURE ; QUANTUM MATERIALS ; ANTIFERROMAGNET ; ANTIPEROVSKITES ; FERMIONS ; STATES ; SN |
收录类别 | SCI |
语种 | 英语 |
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] ; European Research Council (ERC) Advanced Grant[291472] ; ERC Advanced Grant[742068] ; Alexander von Humboldt Foundation of Germany ; National Natural Science Foundation of China[51722106] |
项目资助者 | 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 |
WOS研究方向 | Physics |
WOS类目 | Physics, Multidisciplinary |
WOS记录号 | WOS:000448973100019 |
出版者 | NATURE PUBLISHING GROUP |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/40105 |
专题 | 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.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-+. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论