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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.

Authors:
ORCiD logo [1];  [1];  [1];  [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1];  [1]; ORCiD logo [5]; ORCiD logo [6];  [7]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [3]; ORCiD logo [3]; ORCiD logo [8] more »; ORCiD logo [7];  [4];  [9]; ORCiD logo [2]; ORCiD logo [10] « less
+ Show Author Affiliations
  1. Princeton Univ., NJ (United States)
  2. Peking Univ., Beijing (China)
  3. Sun Yat-Sen Univ., Guangzhou (China)
  4. Copenhagen Univ. (Denmark)
  5. Princeton Univ., NJ (United States); Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States)
  7. Renmin Univ. of China, Beijing (China)
  8. Academia Sinica, Taipei (Taiwan)
  9. Boston College, Chestnut Hill, MA (United States)
  10. Princeton Univ., NJ (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
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
OSTI Identifier:
1676391
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
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

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, and Hasan, M. Zahid. Spin-orbit quantum impurity in a topological magnet. United States: N. p., 2020. Web. doi:10.1038/s41467-020-18111-6.
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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. Spin-orbit quantum impurity in a topological magnet. United States. https://doi.org/10.1038/s41467-020-18111-6
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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, and Hasan, M. Zahid. Fri . "Spin-orbit quantum impurity in a topological magnet". United States. https://doi.org/10.1038/s41467-020-18111-6. https://www.osti.gov/servlets/purl/1676391.
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@article{osti_1676391,
title = {Spin-orbit quantum impurity in a topological magnet},
author = {Yin, Jia-Xin and Shumiya, Nana and Jiang, Yuxiao and Zhou, Huibin and Macam, Gennevieve and Sura, Hano Mohammad and Zhang, Songtian S. and Cheng, Zi-Jia and Guguchia, Zurab and Li, Yangmu and Wang, Qi and Litskevich, Maksim and Belopolski, Ilya and Yang, Xian P. and Cochran, Tyler A. and Chang, Guoqing and Zhang, Qi and Huang, Zhi-Quan and Chuang, Feng-Chuan and Lin, Hsin and Lei, Hechang and Andersen, Brian M. and Wang, Ziqiang and Jia, Shuang and Hasan, M. Zahid},
abstractNote = {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.},
doi = {10.1038/s41467-020-18111-6},
journal = {Nature Communications},
number = 1,
volume = 11,
place = {United States},
year = {Fri Sep 04 00:00:00 EDT 2020},
month = {Fri Sep 04 00:00:00 EDT 2020}
}
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Journal Article:
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https://doi.org/10.1038/s41467-020-18111-6
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Figures / Tables:

Fig. 1 Fig. 1: Engineered atomic impurity state in a topological magnet. a Atomically-resolved topographic image of Sn layer of 1% In doped Co3Sn2S2. b Differential conductance spectrums taken on the Sn lattice (blue) and at the In impurity (red), respectively. c First-principles calculation of the spin-resolved local density of states ofmore » the Sn lattice (blue) and an In impurity (red), which shows a magnetic impurity resonance. The inset shows the spin-down states of the Co atom closest to the In impurity. d Topographic image of an isolated impurity. e Corresponding differential conductance map taken at E = −270 meV (resonance energy). f Correlation between the atomic structure and the pattern in the differential conductance map. g Differential conductance spectra taken across the surface with spatial variation from the center of the In impurity (dark red) to far away (blue). The inset shows the exponential fit to the spatial decay of the impurity resonance.« less
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    How correlations change the magnetic structure factor of the kagome Hubbard model
    journal, October 2021

    Effects of exchange distortions in the magnetic Kagome lattice
    text, January 2020

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