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
Source PublicationNATURE PHYSICS
AbstractMagnetic 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.
Indexed BySCI ; EI
Funding ProjectNational Natural Science Foundation of China[51722106]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000448973100019
EI Accession Number20190806529064
Original Document TypeArticle
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Cited Times:366[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLiu, Enke; Sun, Yan; Felser, Claudia
Affiliation1.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
Recommended Citation
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-+.
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