Anisotropic magnetoelastic response in the magnetic Weyl semimetal Co_(3)Sn_(2)S_(2)

作     者：Chang Liu ChangJiang Yi XingYu Wang JianLei Shen Tao Xie Lin Yang Tom Fenne Uwe Stuhr ShiLiang Li HongMing Weng YouGuo Shi EnKe Liu HuiQian Luo Chang Liu;ChangJiang Yi;XingYu Wang;JianLei Shen;Tao Xie;Lin Yang;Tom Fennel;Uwe Stuhr;ShiLiang Li;HongMing Weng;YouGuo Shi;EnKe Liu;HuiQian Luo

作者机构：Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysiesChinese Academy of SciencesBeijing 100190China School of Physical SciencesUniversity of Chinese Academy of SciencesBejing 100190China Laboratory for Neutron Scattering and ImagingPaul Scherrer InstituteVlligen CH-5232Switzerland Songshan Lake Materials LaboratoryDongguan 523808China SCAS Centre for Excelence in Topological Quantum ComputationBejing 100190China Physical Science LaboratoryHuairou National Comprehensive Science CenterBeijing 101400China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2021年第64卷第5期

页      面：82-90页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2017YFA0303100,2017YFA0302900,2016YFA0300500,and 2017YFA0206300) the National Natural Science Foundation of China(Grant Nos.11974392,11974394,11822411,51722106,11674372,11774399,11961160699,and 12061130200) the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(CAS)(Grant Nos.XDB07020300,XDB25000000,and XDB33000000) the Beijing Natural Science Foundation(Grant Nos.JQ19002,Z180008,and Z190009) the support from the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant Nos.2013002,and 2016004)。 

主　　题：Weyl semimetal magneto-elastic coupling topological materials elastic neutron scattering ferromagnetism 

摘      要：Co_(3)Sn_(2)S_(2) is a recently identified magnetic Weyl semimetal in Shandite compounds. Upon cooling, Co_(3)Sn_(2)S_(2) undergoes a ferromagnetic transition with c-axis polarized moments(0.3 μ_(B)/Co) around T_(C)= 175 K, followed by another magnetic anomaly around T_(A)≈ 140 K. A large intrinsic anomalous Hall effect is observed in the magnetic state below TC with a maximum of anomalous Hall angle near T_(A). Here, we report an elastic neutron scattering on the crystalline lattice of Co_(3)Sn_(2)S_(2) in a magnetic field up to 10 T. A strongly anisotropic magnetoelastic response is observed, while only a slight enhancement of the Bragg peaks is observed when B//c. The in-plane magnetic field(B//ab) dramatically suppresses the Bragg peak intensity probably by tilting the moments and lattice toward the external field direction. The in-plane magnetoelastic response commences from T_(C), and as it is further strengthened below T_(A), it becomes nonmonotonic against the field between T_(A) and T_(C) because of the competition from another in-plane magnetic order. These results suggest that a magnetic field can be employed to tune the Co_(3)Sn_(2)S_(2) lattice and its related topological states.