Spin-orbit quantum impurity in a topological magnet

Yin, Jia-Xin; Shumiya, Nana; Jiang, Yuxiao; Zhou, Huibin; Macam, Gennevieve; Sura, Hano Mohammad; Zhang, Songtian S.; Cheng, Zi-Jia; Guguchia, Zurab; Li, Yangmu; Wang, Qi; Litskevich, Maksim; Belopolski, Ilya; Yang, Xian P.; Cochran, Tyler A.; Chang, Guoqing; Zhang, Qi; Huang, Zhi-Quan; Chuang, Feng-Chuan; Lin, Hsin; Lei, Hechang; Andersen, Brian M.; Wang, Ziqiang; Jia, Shuang; Hasan, M. Zahid

doi:10.1038/s41467-020-18111-6

Title: Spin-orbit quantum impurity in a topological magnet

Journal Article · Fri Sep 04 00:00:00 EDT 2020 · Nature Communications

DOI:https://doi.org/10.1038/s41467-020-18111-6· OSTI ID:1676391

^[1]; Shumiya, Nana ^[1]; Jiang, Yuxiao ^[1]; Zhou, Huibin ^[2];

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^[1]; Cheng, Zi-Jia ^[1];

^[5];

^[6]; Wang, Qi ^[7];

^[1]; Belopolski, Ilya ^[1];

^[1]; Cochran, Tyler A. ^[1];

^[1]; Zhang, Qi ^[1]; Huang, Zhi-Quan ^[3];

^[3];

^[8] more »

Princeton Univ., NJ (United States)
Peking Univ., Beijing (China)
Sun Yat-Sen Univ., Guangzhou (China)
Copenhagen Univ. (Denmark)
Princeton Univ., NJ (United States); Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Renmin Univ. of China, Beijing (China)
Academia Sinica, Taipei (Taiwan)
Boston College, Chestnut Hill, MA (United States)
Princeton Univ., NJ (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Quantum states induced by single-atomic impurities are at the frontier of physics and material science. While such states have been reported in high-temperature superconductors and dilute magnetic semiconductors, they are unexplored in topological magnets which can feature spin-orbit tunability. Here we use spin-polarized scanning tunneling microscopy/spectroscopy (STM/S) to study the engineered quantum impurity in a topological magnet Co₃Sn₂S₂. We find that each substituted In impurity introduces a striking localized bound state. Our systematic magnetization-polarized probe reveals that this bound state is spin-down polarized, in lock with a negative orbital magnetization. Moreover, the magnetic bound states of neighboring impurities interact to form quantized orbitals, exhibiting an intriguing spin-orbit splitting, analogous to the splitting of the topological fermion line. Our work collectively demonstrates the strong spin-orbit effect of the single-atomic impurity at the quantum level, suggesting that a nonmagnetic impurity can introduce spin-orbit coupled magnetic resonance in topological magnets.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation; National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China; Chinese Academy of Sciences (CAS); Renmin University of China; National Center for Theoretical Sciences; Ministry of Science and Technology of Taiwan; Independent Research Fund Denmark

Grant/Contract Number:: AC02-05CH11231; FG-02-05ER46200; DMR-1507585; GBMF4547; GBMF9461; U1832214; 117740072018YFA0305601; XDB28000000; 2016YFA0300504; 2018YFE0202600; 11774423; 11822412; 18XNLG14; 19XNLG17; FG02-99ER45747; MOST-107-2628-M-110-001-MY3; MOST-109-2112-M-001-014-MY3; DFF 8021-00047B

OSTI ID:: 1676391

Journal Information:: Nature Communications, Vol. 11, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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