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Title: Tunable anomalous Hall conductivity through volume-wise magnetic competition in a topological kagome magnet

Abstract

Magnetic topological phases of quantum matter are an emerging frontier in physics and material science. Along these lines, several kagome magnets have appeared as the most promising platforms. Here, we explore magnetic correlations in the kagome magnet Co 3Sn 2S 2. Using muon spin-rotation, we present evidence for competing magnetic orders in the kagome lattice of this compound. Our results show that while the sample exhibits an out-of-plane ferromagnetic ground state, an in-plane antiferromagnetic state appears at temperatures above 90 K, eventually attaining a volume fraction of 80% around 170 K, before reaching a non-magnetic state. Strikingly, the reduction of the anomalous Hall conductivity (AHC) above 90 K linearly follows the disappearance of the volume fraction of the ferromagnetic state. We further show that the competition of these magnetic phases is tunable through applying either an external magnetic field or hydrostatic pressure. Our results taken together suggest the thermal and quantum tuning of Berry curvature induced AHC via external tuning of magnetic order.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5];  [5];  [6];  [2]; ORCiD logo [5];  [5]; ORCiD logo [5]; ORCiD logo [3];  [7];  [3];  [8]; ORCiD logo [8];  [2]; ORCiD logo [2];  [6]; ORCiD logo [4] more »;  [2]; ORCiD logo [5] « less
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Lab. for Muon Spin Spectroscopy; Princeton Univ., NJ (United States). Dept. of Physics
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Lab. for Muon Spin Spectroscopy
  3. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Lab. for Multiscale Materials Experiments
  4. Univ. of Zurich (Switzerland). Dept. of Physics
  5. Princeton Univ., NJ (United States). Dept. of Physics
  6. Peking Univ., Beijing (China). School of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). CAS Center for Excellence in Topological Quantum Computation
  7. Paul Scherrer Inst., Villigen (Switzerland). Lab. for Neutron Scattering
  8. Renmin Univ. of China, Beijing (China). Dept. of Physics
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NNSFC); European Research Council (ERC); Swiss National Science Foundation (SNSF); Gordon and Betty Moore Foundation
OSTI Identifier:
1632135
Grant/Contract Number:  
AC02-05CH11231; FG-02-05ER46200; 2016YFA0300504; 11574394; 11774423; 11822412; ERC-StG-Neupert-757867-PARATOP; 206021_139082; GBMF4547
Resource Type:
Journal Article: 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:
magnetic properties and materials; topological insulators

Citation Formats

Guguchia, Z., Verezhak, J. A. T., Gawryluk, D. J., Tsirkin, S. S., Yin, J.-X., Belopolski, I., Zhou, H., Simutis, G., Zhang, S.-S., Cochran, T. A., Chang, G., Pomjakushina, E., Keller, L., Skrzeczkowska, Z., Wang, Q., Lei, H. C., Khasanov, R., Amato, A., Jia, S., Neupert, T., Luetkens, H., and Hasan, M. Z. Tunable anomalous Hall conductivity through volume-wise magnetic competition in a topological kagome magnet. United States: N. p., 2020. Web. doi:10.1038/s41467-020-14325-w.
Guguchia, Z., Verezhak, J. A. T., Gawryluk, D. J., Tsirkin, S. S., Yin, J.-X., Belopolski, I., Zhou, H., Simutis, G., Zhang, S.-S., Cochran, T. A., Chang, G., Pomjakushina, E., Keller, L., Skrzeczkowska, Z., Wang, Q., Lei, H. C., Khasanov, R., Amato, A., Jia, S., Neupert, T., Luetkens, H., & Hasan, M. Z. Tunable anomalous Hall conductivity through volume-wise magnetic competition in a topological kagome magnet. United States. doi:10.1038/s41467-020-14325-w.
Guguchia, Z., Verezhak, J. A. T., Gawryluk, D. J., Tsirkin, S. S., Yin, J.-X., Belopolski, I., Zhou, H., Simutis, G., Zhang, S.-S., Cochran, T. A., Chang, G., Pomjakushina, E., Keller, L., Skrzeczkowska, Z., Wang, Q., Lei, H. C., Khasanov, R., Amato, A., Jia, S., Neupert, T., Luetkens, H., and Hasan, M. Z. Tue . "Tunable anomalous Hall conductivity through volume-wise magnetic competition in a topological kagome magnet". United States. doi:10.1038/s41467-020-14325-w. https://www.osti.gov/servlets/purl/1632135.
@article{osti_1632135,
title = {Tunable anomalous Hall conductivity through volume-wise magnetic competition in a topological kagome magnet},
author = {Guguchia, Z. and Verezhak, J. A. T. and Gawryluk, D. J. and Tsirkin, S. S. and Yin, J.-X. and Belopolski, I. and Zhou, H. and Simutis, G. and Zhang, S.-S. and Cochran, T. A. and Chang, G. and Pomjakushina, E. and Keller, L. and Skrzeczkowska, Z. and Wang, Q. and Lei, H. C. and Khasanov, R. and Amato, A. and Jia, S. and Neupert, T. and Luetkens, H. and Hasan, M. Z.},
abstractNote = {Magnetic topological phases of quantum matter are an emerging frontier in physics and material science. Along these lines, several kagome magnets have appeared as the most promising platforms. Here, we explore magnetic correlations in the kagome magnet Co3Sn2S2. Using muon spin-rotation, we present evidence for competing magnetic orders in the kagome lattice of this compound. Our results show that while the sample exhibits an out-of-plane ferromagnetic ground state, an in-plane antiferromagnetic state appears at temperatures above 90 K, eventually attaining a volume fraction of 80% around 170 K, before reaching a non-magnetic state. Strikingly, the reduction of the anomalous Hall conductivity (AHC) above 90 K linearly follows the disappearance of the volume fraction of the ferromagnetic state. We further show that the competition of these magnetic phases is tunable through applying either an external magnetic field or hydrostatic pressure. Our results taken together suggest the thermal and quantum tuning of Berry curvature induced AHC via external tuning of magnetic order.},
doi = {10.1038/s41467-020-14325-w},
journal = {Nature Communications},
issn = {2041-1723},
number = 1,
volume = 11,
place = {United States},
year = {2020},
month = {1}
}

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