@article{66d8807eb48c427c97c7081ffeefd4ae,
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 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.",
author = "Z. Guguchia and Verezhak, {J. A.T.} and Gawryluk, {D. J.} and Tsirkin, {S. S.} and Yin, {J. X.} and I. Belopolski and H. Zhou and G. Simutis and Zhang, {S. S.} and Cochran, {T. A.} and G. Chang and E. Pomjakushina and L. Keller and Z. Skrzeczkowska and Q. Wang and Lei, {H. C.} and R. Khasanov and A. Amato and S. Jia and T. Neupert and H. Luetkens and Hasan, {M. Z.}",
note = "Funding Information: The μSR experiments were carried out at the Swiss Muon Source (SμS) Paul Scherrer Insitute, Villigen, Switzerland, using the high field HAL-9500 μSR spectrometer (πE3 beamline), GPS instrument (πM3 beamline) and high pressure GPD instrument (μE1 beamline). The neutron diffraction experiments were performed at the Swiss spallation neutron source SINQ (HRPT and DMC diffractometers), Paul Scherrer Institute, Villi-gen, Switzerland. Z.G. thanks Vladimir Pomjakushin for invaluable support with neutron diffraction experiments/analysis and for his useful discussions. H.C.L. thanks the support by the National Key RandD Program of China (Grants No. 2016YFA0300504), the National Natural Science Foundation of China (No. 11574394, 11774423, 11822412). This project has received funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programm (ERC-StG-Neu-pert-757867-PARATOP). The magnetization measurements were carried out on the PPMS/MPMS devices of the Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, Villigen, Switzerland. This work was supported the Swiss National Science Foundation (grant no. 206021_139082). Work at Princeton University is supported by the Gordon and Betty Moore Foundation (GBMF4547/M.Z.H.)and the U.S. Department of Energy (DOE) under Basic Energy Sciences (DOE/BES DE-FG-02-05ER46200). M.Z.H. acknowledges support from the Miller Institute of Basic Research in Science at the University of California at Berkeley and Lawrence Berkeley National Laboratory in the form of a Visiting Miller Professorship during the early stages of this work. M.Z.H. also acknowledges visiting scientist support from IQIM at the California Institute of Technology. Publisher Copyright: {\textcopyright} 2020, The Author(s).",
year = "2020",
month = dec,
day = "1",
doi = "10.1038/s41467-020-14325-w",
language = "English (US)",
volume = "11",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}