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首页> 外文期刊>Advanced Functional Materials >33% Giant Anomalous Hall Current Driven by Both Intrinsic and Extrinsic Contributions in Magnetic Weyl Semimetal Co_3Sn_2S_2
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33% Giant Anomalous Hall Current Driven by Both Intrinsic and Extrinsic Contributions in Magnetic Weyl Semimetal Co_3Sn_2S_2

机译：33％的巨大异常霍尔电流由磁性Weyl半型CO_3SN_2S_2中的内在和外在贡献驱动

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摘要

The anomalous Hall effect (AHE) can be induced by intrinsic mechanisms due to the band Berry phase and extrinsic one arising from the impurity scattering. The recently discovered magnetic Weyl semimetal Co(3)Sn(2)S(2)exhibits a large intrinsic anomalous Hall conductivity (AHC) and a giant anomalous Hall angle (AHA). The predicted energy dependence of the AHC in this material exhibits a plateau at 1000 omega(-1)cm(-1)and an energy width of 100 meV just belowE(F), thereby implying that the large intrinsic AHC will not significantly change against small-scale energy disturbances such as slightp-doping. Here, the extrinsic contribution is successfully triggered from alien-atom scattering in addition to the intrinsic one of the pristine material by introducing a small amount of Fe dopant to substitute Co in Co3Sn2S2. The experimental results show that the AHC and AHA can be prominently enhanced up to 1850 omega(-1)cm(-1)and 33%, respectively, owing to the synergistic contributions from the intrinsic and extrinsic mechanisms as distinguished by the TYJ model. In particular, the tuned AHA exhibits a record value among known magnetic materials in low fields. This study opens up a pathway to engineer giant AHE in magnetic Weyl semimetals, thereby potentially advancing the topological spintronics/Weyltronics.
机译：由于带浆果相的内在机制和由杂质散射引起的外部，可以通过内在机制来诱导异常霍尔效应（AHE）。最近发现的磁性Weyl半型Co（3）Sn（2）S（2）表现出大型内在的异常霍尔电导率（AHC）和巨大的异常霍尔角（AHA）。在该材料中的AHC的预测能量依赖性在1000ω（-1）cm（-1）处具有高原，并且在下面（f）的100 mev的能量宽度，从而暗示大型内在的AHC不会显着改变小规模的能量扰动，如轻微的掺杂。这里，除了在CO3SN2S2中的替代CO替代CO的替代CO的原始材料之外，外部贡献是从外星原子散射中的从外星原子散射中触发。实验结果表明，由于TYJ模型的内在和外在机制的协同贡献，AHC和AHA可以分别突出至1850厘米（-1）cm（-1）和33％。特别地，调谐的AHA在低场中的已知磁性材料中表现出记录值。本研究开辟了一个通向工程师巨头AHE在磁性Weyl半定的途径，从而潜在地推动拓扑闪光灯/ Weyltronics。

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  • 来源
    《Advanced Functional Materials》 |2020年第32期|2000830.1-2000830.7|共7页
  • 作者

    Shen Jianlei; Zeng Qingqi; Zhang Shen; Sun Hongyi; Yao Qiushi; Xi Xuekui; Wang Wenhong; Wu Guangheng; Shen Baogen; Liu Qihang; Liu Enke;

  • 作者单位

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Phys Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Phys Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Phys Sci Beijing 100049 Peoples R China;

    Southern Univ Sci & Technol SUSTech Shenzhen Inst Quantum Sci & Technol Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol SUSTech Dept Phys Shenzhen 518055 Peoples R China;

    Southern Univ Sci & Technol SUSTech Shenzhen Inst Quantum Sci & Technol Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol SUSTech Dept Phys Shenzhen 518055 Peoples R China;

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China|Songshan Lake Mat Lab Dongguan 523808 Peoples R China;

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China;

    Southern Univ Sci & Technol SUSTech Shenzhen Inst Quantum Sci & Technol Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol SUSTech Dept Phys Shenzhen 518055 Peoples R China|Southern Univ Sci & Technol Guangdong Prov Key Lab Computat Sci & Mat Design Shenzhen 518055 Peoples R China;

    Chinese Acad Sci Inst Phys State Key Lab Magnetism Beijing 100190 Peoples R China|Songshan Lake Mat Lab Dongguan 523808 Peoples R China;

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  • 关键词

    anomalous Hall angle; anomalous Hall effect; extrinsic mechanisms; intrinsic mechanisms; magnetic Weyl semimetals;

    机译：异常霍尔角;异常霍尔效应;外在机制;内在机制;磁性Weyl Semimetals;

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