Atomically precise engineering of spin–orbit polarons in a kagome magnetic Weyl semimetal

Hui Chen; Yuqing Xing; Hengxin Tan; Li Huang; Qi Zheng; Zihao Huang; Xianghe Han; Bin Hu; Yuhan Ye; Yan Li; Yao Xiao; Hechang Lei; Xianggang Qiu; Enke Liu; Haitao Yang; Ziqiang Wang; Binghai Yan; Hong-Jun Gao

doi:10.1038/s41467-024-46729-3

Atomically precise engineering of spin–orbit polarons in a kagome magnetic Weyl semimetal

Hui Chen, Yuqing Xing, Hengxin Tan, Li Huang, Qi Zheng, Zihao Huang, Xianghe Han, Bin Hu, Yuhan Ye, Yan Li, Yao Xiao, Hechang Lei, Xianggang Qiu, Enke Liu, Haitao Yang, Ziqiang Wang, Binghai Yan, Hong-Jun Gao^*

^*Corresponding author for this work

Department of Condensed Matter Physics

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Abstract

Atomically precise defect engineering is essential to manipulate the properties of emerging topological quantum materials for practical quantum applications. However, this remains challenging due to the obstacles in modifying the typically complex crystal lattice with atomic precision. Here, we report the atomically precise engineering of the vacancy-localized spin–orbit polarons in a kagome magnetic Weyl semimetal Co3Sn2S2, using scanning tunneling microscope. We achieve the step-by-step repair of the selected vacancies, leading to the formation of artificial sulfur vacancies with elaborate geometry. We find that that the bound states localized around these vacancies undergo a symmetry dependent energy shift towards Fermi level with increasing vacancy size. As the vacancy size increases, the localized magnetic moments of spin–orbit polarons become tunable and eventually become itinerantly negative due to spin–orbit coupling in the kagome flat band. These findings provide a platform for engineering atomic quantum states in topological quantum materials at the atomic scale.

Original language	English
Article number	2301
Journal	Nature Communications
Volume	15
Issue number	1
DOIs	https://doi.org/10.1038/s41467-024-46729-3
Publication status	Published - 14 Mar 2024

Bibliographical note

We thank Chendong Zhang and Claudia Felser for useful discussions. We thank Senhao Lv for assistance with the magnetization measurements. The work is supported by grants from the National Natural Science Foundation of China (61888102 (H.-J.G.) and 52022105(H.C.)), the National Key Research and Development Projects of China (2022YFA1204100 (H.Y. and H.C.), 2019YFA0308500 (H.-J.G. and L.H.), and 2018YFA0305800 (L.H.)), and the Chinese Academy of Sciences (YSBR-003 (H.C., L.H.)). Z. W. is supported by the US DOE, Basic Energy Sciences Grant No. DE-FG02-99ER45747and by Research Corporation for Science Advancement Cottrell SEED Award No. 27856. B.Y. was supported by financial support by the European Research Council (ERC Consolidator Grant “NonlinearTopo”, No. 815869) and ISF -Singapore-Israel Research Grant (No. 3520/20).

All Science Journal Classification (ASJC) codes

General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

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Cite this

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title = "Atomically precise engineering of spin–orbit polarons in a kagome magnetic Weyl semimetal",

abstract = "Atomically precise defect engineering is essential to manipulate the properties of emerging topological quantum materials for practical quantum applications. However, this remains challenging due to the obstacles in modifying the typically complex crystal lattice with atomic precision. Here, we report the atomically precise engineering of the vacancy-localized spin–orbit polarons in a kagome magnetic Weyl semimetal Co3Sn2S2, using scanning tunneling microscope. We achieve the step-by-step repair of the selected vacancies, leading to the formation of artificial sulfur vacancies with elaborate geometry. We find that that the bound states localized around these vacancies undergo a symmetry dependent energy shift towards Fermi level with increasing vacancy size. As the vacancy size increases, the localized magnetic moments of spin–orbit polarons become tunable and eventually become itinerantly negative due to spin–orbit coupling in the kagome flat band. These findings provide a platform for engineering atomic quantum states in topological quantum materials at the atomic scale.",

author = "Hui Chen and Yuqing Xing and Hengxin Tan and Li Huang and Qi Zheng and Zihao Huang and Xianghe Han and Bin Hu and Yuhan Ye and Yan Li and Yao Xiao and Hechang Lei and Xianggang Qiu and Enke Liu and Haitao Yang and Ziqiang Wang and Binghai Yan and Hong-Jun Gao",

note = "We thank Chendong Zhang and Claudia Felser for useful discussions. We thank Senhao Lv for assistance with the magnetization measurements. The work is supported by grants from the National Natural Science Foundation of China (61888102 (H.-J.G.) and 52022105(H.C.)), the National Key Research and Development Projects of China (2022YFA1204100 (H.Y. and H.C.), 2019YFA0308500 (H.-J.G. and L.H.), and 2018YFA0305800 (L.H.)), and the Chinese Academy of Sciences (YSBR-003 (H.C., L.H.)). Z. W. is supported by the US DOE, Basic Energy Sciences Grant No. DE-FG02-99ER45747and by Research Corporation for Science Advancement Cottrell SEED Award No. 27856. B.Y. was supported by financial support by the European Research Council (ERC Consolidator Grant “NonlinearTopo”, No. 815869) and ISF -Singapore-Israel Research Grant (No. 3520/20).",

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AU - Chen, Hui

AU - Xing, Yuqing

AU - Tan, Hengxin

AU - Huang, Li

AU - Zheng, Qi

AU - Huang, Zihao

AU - Han, Xianghe

AU - Hu, Bin

AU - Ye, Yuhan

AU - Li, Yan

AU - Xiao, Yao

AU - Lei, Hechang

AU - Qiu, Xianggang

AU - Liu, Enke

AU - Yang, Haitao

AU - Wang, Ziqiang

AU - Yan, Binghai

AU - Gao, Hong-Jun

N1 - We thank Chendong Zhang and Claudia Felser for useful discussions. We thank Senhao Lv for assistance with the magnetization measurements. The work is supported by grants from the National Natural Science Foundation of China (61888102 (H.-J.G.) and 52022105(H.C.)), the National Key Research and Development Projects of China (2022YFA1204100 (H.Y. and H.C.), 2019YFA0308500 (H.-J.G. and L.H.), and 2018YFA0305800 (L.H.)), and the Chinese Academy of Sciences (YSBR-003 (H.C., L.H.)). Z. W. is supported by the US DOE, Basic Energy Sciences Grant No. DE-FG02-99ER45747and by Research Corporation for Science Advancement Cottrell SEED Award No. 27856. B.Y. was supported by financial support by the European Research Council (ERC Consolidator Grant “NonlinearTopo”, No. 815869) and ISF -Singapore-Israel Research Grant (No. 3520/20).

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N2 - Atomically precise defect engineering is essential to manipulate the properties of emerging topological quantum materials for practical quantum applications. However, this remains challenging due to the obstacles in modifying the typically complex crystal lattice with atomic precision. Here, we report the atomically precise engineering of the vacancy-localized spin–orbit polarons in a kagome magnetic Weyl semimetal Co3Sn2S2, using scanning tunneling microscope. We achieve the step-by-step repair of the selected vacancies, leading to the formation of artificial sulfur vacancies with elaborate geometry. We find that that the bound states localized around these vacancies undergo a symmetry dependent energy shift towards Fermi level with increasing vacancy size. As the vacancy size increases, the localized magnetic moments of spin–orbit polarons become tunable and eventually become itinerantly negative due to spin–orbit coupling in the kagome flat band. These findings provide a platform for engineering atomic quantum states in topological quantum materials at the atomic scale.

AB - Atomically precise defect engineering is essential to manipulate the properties of emerging topological quantum materials for practical quantum applications. However, this remains challenging due to the obstacles in modifying the typically complex crystal lattice with atomic precision. Here, we report the atomically precise engineering of the vacancy-localized spin–orbit polarons in a kagome magnetic Weyl semimetal Co3Sn2S2, using scanning tunneling microscope. We achieve the step-by-step repair of the selected vacancies, leading to the formation of artificial sulfur vacancies with elaborate geometry. We find that that the bound states localized around these vacancies undergo a symmetry dependent energy shift towards Fermi level with increasing vacancy size. As the vacancy size increases, the localized magnetic moments of spin–orbit polarons become tunable and eventually become itinerantly negative due to spin–orbit coupling in the kagome flat band. These findings provide a platform for engineering atomic quantum states in topological quantum materials at the atomic scale.

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ER -

Atomically precise engineering of spin–orbit polarons in a kagome magnetic Weyl semimetal

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