@article{26a02030f21a4941a82aee6169be78c8,
title = "Spin-orbit quantum impurity in a topological magnet",
abstract = "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.",
author = "Yin, {Jia Xin} and Nana Shumiya and Yuxiao Jiang and Huibin Zhou and Gennevieve Macam and Sura, {Hano Omar Mohammad} and Zhang, {Songtian S.} and Cheng, {Zi Jia} and Zurab Guguchia and Yangmu Li and Qi Wang and Maksim Litskevich and Ilya Belopolski and Yang, {Xian P.} and Cochran, {Tyler A.} and Guoqing Chang and Qi Zhang and Huang, {Zhi Quan} and Chuang, {Feng Chuan} and Hsin Lin and Hechang Lei and Andersen, {Brian M.} and Ziqiang Wang and Shuang Jia and Hasan, {M. Zahid}",
note = "Funding Information: We thank Z. Song, T. Neupert, B. Lian, and H. J. Gao for insightful discussions. Experimental and theoretical work at Princeton University was supported by the Gordon and Betty Moore Foundation (Grant No. GBMF4547 and GBMF9461/Hasan). Sample characterization was supported by the United States Department of Energy (US DOE) under the Basic Energy Sciences programme (Grant No. DOE/BES DE-FG-02-05ER46200). M.Z.H. acknowledges support from Lawrence Berkeley National Laboratory and the Miller Institute of Basic Research in Science at the University of California, Berkeley in the form of a Visiting Miller Professorship. This work benefited from partial lab infra-structure support under NSF-DMR-1507585. M. Z. H. also acknowledges visiting scientist support from IQIMat the California Institute of Technology. The work at Peking University was supported by the National Natural Science Foundation of China No. U1832214, No.11774007, the National Key R&D Program of China (2018YFA0305601), and the strategic Priority Research Program of Chinese Academy of Sciences (XDB28000000). The work at Renmin University was supported by the National Key R&D Program of China (Grants No. 2016YFA0300504 and 2018YFE0202600), the National Natural Science Foundation of China (No. 11774423,11822412), the Fundamental Research Funds for the Central Universities, and the Research Funds of Renmin University of China (RUC) (18XNLG14, 19XNLG17). Work at Boston College was supported by the U.S. Department of Energy, Basic Energy Sciences Grant No. DE-FG02-99ER45747. F.C.C. and H.L. acknowledge support from the National Center for Theoretical Sciences and the Ministry of Science and Technology of Taiwan under Grants No. MOST-107-2628-M-110-001-MY3 and MOST-109-2112-M-001-014-MY3. F.C.C. is also grateful to the National Center for High-Performance Computing for computer time and facilities. B.M.A. and H.O.M.S. acknowledge support from the Independent Research Fund Denmark grant number DFF 8021-00047B. Publisher Copyright: {\textcopyright} 2020, The Author(s).",
year = "2020",
month = dec,
day = "1",
doi = "10.1038/s41467-020-18111-6",
language = "English (US)",
volume = "11",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}