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Zicheng Tao; Tianye Yu; Jianyang Ding; Zhicheng Jiang; Zhenhai Yu; Wei Xia; Xia Wang; Xuerong Liu; Yulin Chen; Dawei Shen; Yan Sun; Yanfeng Guo

doi:10.1103/PhysRevB.111.L161114

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Tunable anomalous Hall effect by selective mirror symmetry breaking in the kagome magnet $GdM n_{6} G e_{6}$

Zicheng Tao ^1,*, Tianye Yu^2,*, Jianyang Ding^3,4,*, Zhicheng Jiang⁴, Zhenhai Yu¹, Wei Xia^1,7, Xia Wang^1,5, Xuerong Liu ^1,6, Yulin Chen^7,8 et al.

Dawei Shen ^4,†, Yan Sun^2,‡, and Yanfeng Guo ^1,7,§

¹School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
²Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
³National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
⁴National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
⁵Analytical Instrumentation Center, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
⁶Center for Transformative Science, ShanghaiTech University, Shanghai 201210, China
⁷ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, China
⁸Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom

^*These authors contributed equally to this work.
^†Contact author: dwshen@ustc.edu.cn
^‡Contact author: sunyan@imr.ac.cn
^§Contact author: guoyf@shanghaitech.edu.cn

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Phys. Rev. B 111, L161114 – Published 16 April, 2025

DOI: https://doi.org/10.1103/PhysRevB.111.L161114

Abstract

The crystal symmetry plays a pivotal role in protecting the nontrivial electronic states in a topological phase. Manipulation of the crystal symmetry and hence the nontrivial topological states would serve as a fertile ground to explore exotic topological properties. Combining experimental and theoretical investigations, we demonstrate herein the flexible tuning of nontrivial topological states in the single phase of kagome magnet $GdM n_{6} G e_{6}$ . Very large anomalous Hall conductivities caused by distinct Berry curvatures along different crystallographic directions are realized through selectively breaking the mirror symmetries in these directions by external magnetic field, which is fully supported by the first-principles calculations. Our results set an explicit example, demonstrating that the strong correlation between mirror symmetry and Berry curvature generates significant intrinsic anomalous Hall effect, as well as tunable topological properties in a single magnetic topological phase.

Physical Review B

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Tunable anomalous Hall effect by selective mirror symmetry breaking in the kagome magnet $GdM n_{6} G e_{6}$

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Tunable anomalous Hall effect by selective mirror symmetry breaking in the kagome magnet GdMn6Ge6

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Tunable anomalous Hall effect by selective mirror symmetry breaking in the kagome magnet $GdM n_{6} G e_{6}$