Localized spin-orbit polaron in magnetic Weyl semimetal Co3Sn2S2

Yuqing Xing, Jianlei Shen, Hui Chen, Li Huang, Yuxiang Gao, Qi Zheng, Yu-Yang Zhang, Geng Li, Bin Hu, Guojian Qian, Lu Cao, Xianli Zhang, Peng Fan, Ruisong Ma, Qi Wang, Qiangwei Yin, Hechang Lei, Wei Ji, Shixuan Du, Haitao Yang, Wenhong Wang, Chengmin Shen, Xiao Lin, Enke Liu (), Baogen Shen, Ziqiang Wang () and Hong-Jun Gao ()
Additional contact information
Yuqing Xing: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Jianlei Shen: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Hui Chen: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Li Huang: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Yuxiang Gao: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Qi Zheng: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Yu-Yang Zhang: School of Physical Sciences, University of Chinese Academy of Sciences
Geng Li: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Bin Hu: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Guojian Qian: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Lu Cao: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Xianli Zhang: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Peng Fan: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Ruisong Ma: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Qi Wang: Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China
Qiangwei Yin: Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China
Hechang Lei: Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China
Wei Ji: Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China
Shixuan Du: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Haitao Yang: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Wenhong Wang: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Chengmin Shen: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Xiao Lin: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Enke Liu: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Baogen Shen: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Ziqiang Wang: Department of Physics, Boston College
Hong-Jun Gao: Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract The kagome lattice Co3Sn2S2 exhibits the quintessential topological phenomena of a magnetic Weyl semimetal such as the chiral anomaly and Fermi-arc surface states. Probing its magnetic properties is crucial for understanding this correlated topological state. Here, using spin-polarized scanning tunneling microscopy/spectroscopy (STM/S) and non-contact atomic force microscopy (nc-AFM) combined with first-principle calculations, we report the discovery of localized spin-orbit polarons (SOPs) with three-fold rotation symmetry nucleated around single S-vacancies in Co3Sn2S2. The SOPs carry a magnetic moment and a large diamagnetic orbital magnetization of a possible topological origin associated relating to the diamagnetic circulating current around the S-vacancy. Appreciable magneto-elastic coupling of the SOP is detected by nc-AFM and STM. Our findings suggest that the SOPs can enhance magnetism and more robust time-reversal-symmetry-breaking topological phenomena. Controlled engineering of the SOPs may pave the way toward practical applications in functional quantum devices.

Date: 2020
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DOI: 10.1038/s41467-020-19440-2

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