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

Journal Article · · Nature Communications
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

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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); European Research Council (ERC); Swiss National Science Foundation (SNSF); Gordon and Betty Moore Foundation
Grant/Contract Number:
AC02-05CH11231; FG-02-05ER46200; 2016YFA0300504; 11574394; 11774423; 11822412; ERC-StG-Neupert-757867-PARATOP; 206021_139082; GBMF4547
OSTI ID:
1632135
Journal Information:
Nature Communications, Vol. 11, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 89 works
Citation information provided by
Web of Science

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Cited By (9)

Optical detection of charge-density-wave instability in the non-magnetic kagome metal KV$_3$Sb$_5$ text January 2021
Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5 text January 2020
Spin-orbit quantum impurity and quantization in a topological magnet text January 2020
Intriguing magnetism of the topological kagome magnet TbMn_6Sn_6 preprint January 2021
Probing topological quantum matter with scanning tunnelling microscopy journal March 2021
Exchange biased Anomalous Hall Effect driven by frustration in a magnetic Kagome lattice text January 2019
Signatures of a topological Weyl loop in Co$_3$Sn$_2$S$_2$ preprint January 2020
Exchange biased anomalous Hall effect driven by frustration in a magnetic kagome lattice journal January 2020
Strong coupling nature of kagome superconductivity in LaRu$_3$Si$_2$ text January 2020

Figures / Tables (5)