Anisotropic transport properties and topological Hall effect in the annealed kagome antiferromagnet FeGe  

作　　者：Jiajun Ma Chenfei Shi Yantao Cao Yuwei Zhang Yazhou Li Jiaxing Liao Jialu Wang Wenhe Jiao Hanjie Guo Chenchao Xu Shixun Cao Jianhui Dai Jin-Ke Bao Yuke Li 

机构地区：[1]School of Physics,Hangzhou Key Laboratory of Quantum Matters,Hangzhou Normal University,Hangzhou,311121,China [2]Department of Physics,Materials Genome Institute and International Center for Quantum and Molecular Structures,Shanghai University,Shanghai,200444,China [3]Key Laboratory of Quantum Precision Measurement of Zhejiang Province,Department of Applied Physics,Zhejiang University of Technology,Hangzhou,310023,China [4]Songshan Lake Materials Laboratory,Dongguan,523808,China [5]School of Physical Science and Technology,Lanzhou University,Lanzhou,730000,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第3期153-160,共8页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Natural Science foundation of China(Grant Nos.U1932155,12374116,12204298 and 12274109);the Hangzhou Joint Fund of the Zhejiang Provincial Natural Science Foundation of China(Grant No.LHZSZ24A040001);funded by the Guangdong Basic and Applied Basic Research Foundation(Grant No.2022B1515120020)。

摘　　要：Electron correlation often gives birth to various orders in quantum materials.Recently,a strongly correlated kagome antiferromagnet Fe Ge is discovered to undergo a charge density wave transition inside the A-type antiferromagnetic state,providing an opportunity to explore the interplay between charge order and magnetism.Here,we reported the observation of anisotropic resistivity and Hall effect,along with a topological Hall effect,in the annealed Fe Ge crystals.As the current flows along the abplane,the temperature dependence ofρ_(ab)exhibits a distinct resistivity loop related to a first-order transition at T_(cdw).The applied magnetic fields do not alter T_(cdw)but can induce a spin-flop transition at H_(sf).Consequently,a field-induced large topological Hall effect is observed in the canting antiferromagnetic(CAFM)state below T_(cant),which is possibly attributed to the non-trivial spin texture during the spin-flop process.Whereas,as current is parallel to c-axis,both the field-induced transitions inρ_(c)andχ_(c)disappear.Instead,the Hall resistivity in the annealed Fe Ge significantly exhibits a deviation from the linear field-dependent.These findings provide valuable insight into revealing the interplay among magnetism,charge order and topology in the kagome magnets.

关 键 词：charge density wave Hall effect transport properties kagome magnet 

分 类 号：O469[理学—凝聚态物理]