Bipolarity Induced Gigantic Intrinsic Anomalous Hall Effect in Iterative-Grown Kagome Semimetal Co3Sn2S2 Crystals

Senhao Lv; Hui Guo; Wei Jiang; Jiangang Yang; Lin Zhao; Minjun Wang; Hengxin Tan; Roger Guzman; Xianghua Kong; Ke Zhu; Zhen Zhao; Guoyu Xian; Li Huang; Hui Chen; Dongliang Zhao; Xiao Lin; Stephen J. Pennycook; Wu Zhou; Wei Ji; Binghai Yan; Jun He; Xingjiang Zhou; Haitao Yang; Feng Liu; Hong Jun Gao

doi:10.1002/adfm.202510587

Bipolarity Induced Gigantic Intrinsic Anomalous Hall Effect in Iterative-Grown Kagome Semimetal Co₃Sn₂S₂ Crystals

Senhao Lv, Hui Guo, Wei Jiang, Jiangang Yang, Lin Zhao, Minjun Wang, Hengxin Tan, Roger Guzman, Xianghua Kong, Ke Zhu, Zhen Zhao, Guoyu Xian, Li Huang, Hui Chen, Dongliang Zhao, Xiao Lin, Stephen J. Pennycook, Wu Zhou, Wei Ji, Binghai YanJun He^*, Xingjiang Zhou^*, Haitao Yang^*, Feng Liu^*, Hong Jun Gao^*

^*Corresponding author for this work

Department of Condensed Matter Physics

Research output: Contribution to journal › Article › peer-review

Abstract

As a magnetic Weyl semimetal with broken time-reversal symmetry, kagome-lattice Co₃Sn₂S₂ hosts a plethora of exotic quantum phenomena due to the interplay between magnetism, electronic correlations, and non-trivial band topology. However, achieving high crystal quality, which is crucial for understanding intrinsic mechanisms and enhancing the physical properties, still remains a significant challenge. Here, the synthesis of ultra-high-quality Co₃Sn₂S₂ single crystals is reported via an iterative chemical vapor transport (iterative-CVT) approach, achieving gigantic anomalous Hall conductivity (AHC) of 1600 Ω⁻¹cm⁻¹, anomalous Hall angle (AHA) of 40%, and exceptional carrier mobility and magnetoresistance of 10 490 cm² V⁻¹ s⁻¹ and 2500%. Intriguingly, a striking 65% enhancement of the AHC is observed upon increasing the temperature from 2 to 50 K, attributed to the presence of bipolar carrier contributions from the Weyl bands. Furthermore, an ultra-narrow flat band near the Fermi level is directly visualized by angle-resolved photoemission spectroscopy, suggesting enhanced electron correlations that render the electron concentration and hence AHC highly temperature-dependent. The findings provide a robust material platform to inspire further research into emergent quantum phenomena in magnetic kagome systems.

Original language	English
Article number	e10587
Journal	Advanced Functional Materials
DOIs	https://doi.org/10.1002/adfm.202510587
Publication status	Published Online - 1 Jul 2025

Funding

The authors would like to thank Prof. Enke Liu and Prof. Gang Su for valuable discussions. The work was supported by grants from the National Key Research and Development Projects of China (2022YFA1204100, 2022YFA1403900), the National Natural Science Foundation of China (62488201, 12204037, 11974422, 12104313), the Chinese Academy of Sciences (XDB33030100), the Innovation Program of Quantum Science and Technology (2021ZD0302700), F.L. acknowledges National Science Foundation of U.S.A. (#2326228).

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Chemistry
Biomaterials
General Materials Science
Condensed Matter Physics
Electrochemistry

Access to Document

10.1002/adfm.202510587

Cite this

Lv, S., Guo, H., Jiang, W., Yang, J., Zhao, L., Wang, M., Tan, H., Guzman, R., Kong, X., Zhu, K., Zhao, Z., Xian, G., Huang, L., Chen, H., Zhao, D., Lin, X., Pennycook, S. J., Zhou, W., Ji, W., ... Gao, H. J. (2025). Bipolarity Induced Gigantic Intrinsic Anomalous Hall Effect in Iterative-Grown Kagome Semimetal Co₃Sn₂S₂ Crystals. Advanced Functional Materials, Article e10587. Advance online publication. https://doi.org/10.1002/adfm.202510587

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title = "Bipolarity Induced Gigantic Intrinsic Anomalous Hall Effect in Iterative-Grown Kagome Semimetal Co3Sn2S2 Crystals",

abstract = "As a magnetic Weyl semimetal with broken time-reversal symmetry, kagome-lattice Co3Sn2S2 hosts a plethora of exotic quantum phenomena due to the interplay between magnetism, electronic correlations, and non-trivial band topology. However, achieving high crystal quality, which is crucial for understanding intrinsic mechanisms and enhancing the physical properties, still remains a significant challenge. Here, the synthesis of ultra-high-quality Co3Sn2S2 single crystals is reported via an iterative chemical vapor transport (iterative-CVT) approach, achieving gigantic anomalous Hall conductivity (AHC) of 1600 Ω−1cm−1, anomalous Hall angle (AHA) of 40\%, and exceptional carrier mobility and magnetoresistance of 10 490 cm2 V−1 s−1 and 2500\%. Intriguingly, a striking 65\% enhancement of the AHC is observed upon increasing the temperature from 2 to 50 K, attributed to the presence of bipolar carrier contributions from the Weyl bands. Furthermore, an ultra-narrow flat band near the Fermi level is directly visualized by angle-resolved photoemission spectroscopy, suggesting enhanced electron correlations that render the electron concentration and hence AHC highly temperature-dependent. The findings provide a robust material platform to inspire further research into emergent quantum phenomena in magnetic kagome systems.",

author = "Senhao Lv and Hui Guo and Wei Jiang and Jiangang Yang and Lin Zhao and Minjun Wang and Hengxin Tan and Roger Guzman and Xianghua Kong and Ke Zhu and Zhen Zhao and Guoyu Xian and Li Huang and Hui Chen and Dongliang Zhao and Xiao Lin and Pennycook, \{Stephen J.\} and Wu Zhou and Wei Ji and Binghai Yan and Jun He and Xingjiang Zhou and Haitao Yang and Feng Liu and Gao, \{Hong Jun\}",

note = "Publisher Copyright: {\textcopyright} 2025 Wiley-VCH GmbH.",

year = "2025",

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doi = "10.1002/adfm.202510587",

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Lv, S, Guo, H, Jiang, W, Yang, J, Zhao, L, Wang, M, Tan, H, Guzman, R, Kong, X, Zhu, K, Zhao, Z, Xian, G, Huang, L, Chen, H, Zhao, D, Lin, X, Pennycook, SJ, Zhou, W, Ji, W, Yan, B, He, J, Zhou, X, Yang, H, Liu, F & Gao, HJ 2025, 'Bipolarity Induced Gigantic Intrinsic Anomalous Hall Effect in Iterative-Grown Kagome Semimetal Co₃Sn₂S₂ Crystals', Advanced Functional Materials. https://doi.org/10.1002/adfm.202510587

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T1 - Bipolarity Induced Gigantic Intrinsic Anomalous Hall Effect in Iterative-Grown Kagome Semimetal Co3Sn2S2 Crystals

AU - Lv, Senhao

AU - Guo, Hui

AU - Jiang, Wei

AU - Yang, Jiangang

AU - Zhao, Lin

AU - Wang, Minjun

AU - Tan, Hengxin

AU - Guzman, Roger

AU - Kong, Xianghua

AU - Zhu, Ke

AU - Zhao, Zhen

AU - Xian, Guoyu

AU - Huang, Li

AU - Chen, Hui

AU - Zhao, Dongliang

AU - Lin, Xiao

AU - Pennycook, Stephen J.

AU - Zhou, Wu

AU - Ji, Wei

AU - Yan, Binghai

AU - He, Jun

AU - Zhou, Xingjiang

AU - Yang, Haitao

AU - Liu, Feng

AU - Gao, Hong Jun

PY - 2025/7/1

Y1 - 2025/7/1

N2 - As a magnetic Weyl semimetal with broken time-reversal symmetry, kagome-lattice Co3Sn2S2 hosts a plethora of exotic quantum phenomena due to the interplay between magnetism, electronic correlations, and non-trivial band topology. However, achieving high crystal quality, which is crucial for understanding intrinsic mechanisms and enhancing the physical properties, still remains a significant challenge. Here, the synthesis of ultra-high-quality Co3Sn2S2 single crystals is reported via an iterative chemical vapor transport (iterative-CVT) approach, achieving gigantic anomalous Hall conductivity (AHC) of 1600 Ω−1cm−1, anomalous Hall angle (AHA) of 40%, and exceptional carrier mobility and magnetoresistance of 10 490 cm2 V−1 s−1 and 2500%. Intriguingly, a striking 65% enhancement of the AHC is observed upon increasing the temperature from 2 to 50 K, attributed to the presence of bipolar carrier contributions from the Weyl bands. Furthermore, an ultra-narrow flat band near the Fermi level is directly visualized by angle-resolved photoemission spectroscopy, suggesting enhanced electron correlations that render the electron concentration and hence AHC highly temperature-dependent. The findings provide a robust material platform to inspire further research into emergent quantum phenomena in magnetic kagome systems.

AB - As a magnetic Weyl semimetal with broken time-reversal symmetry, kagome-lattice Co3Sn2S2 hosts a plethora of exotic quantum phenomena due to the interplay between magnetism, electronic correlations, and non-trivial band topology. However, achieving high crystal quality, which is crucial for understanding intrinsic mechanisms and enhancing the physical properties, still remains a significant challenge. Here, the synthesis of ultra-high-quality Co3Sn2S2 single crystals is reported via an iterative chemical vapor transport (iterative-CVT) approach, achieving gigantic anomalous Hall conductivity (AHC) of 1600 Ω−1cm−1, anomalous Hall angle (AHA) of 40%, and exceptional carrier mobility and magnetoresistance of 10 490 cm2 V−1 s−1 and 2500%. Intriguingly, a striking 65% enhancement of the AHC is observed upon increasing the temperature from 2 to 50 K, attributed to the presence of bipolar carrier contributions from the Weyl bands. Furthermore, an ultra-narrow flat band near the Fermi level is directly visualized by angle-resolved photoemission spectroscopy, suggesting enhanced electron correlations that render the electron concentration and hence AHC highly temperature-dependent. The findings provide a robust material platform to inspire further research into emergent quantum phenomena in magnetic kagome systems.

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DO - 10.1002/adfm.202510587

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