Hidden magnetism uncovered in a charge ordered bilayer kagome material ScV6Sn6

Z. Guguchia (), D. J. Gawryluk (), S. Shin, Z. Hao, C. Mielke, D. Das, I. Plokhikh, L. Liborio, J. Kane Shenton, Y. Hu, V. Sazgari, M. Medarde, H. Deng, Y. Cai, C. Chen, Y. Jiang, A. Amato, M. Shi, M. Z. Hasan, J.-X. Yin, R. Khasanov, E. Pomjakushina and H. Luetkens
Additional contact information
Z. Guguchia: Paul Scherrer Institute
D. J. Gawryluk: Paul Scherrer Institut
S. Shin: Paul Scherrer Institut
Z. Hao: Southern University of Science and Technology
C. Mielke: Paul Scherrer Institute
D. Das: Paul Scherrer Institute
I. Plokhikh: Paul Scherrer Institut
L. Liborio: Rutherford Appleton Laboratory
J. Kane Shenton: Rutherford Appleton Laboratory
Y. Hu: Paul Scherrer Institut
V. Sazgari: Paul Scherrer Institute
M. Medarde: Paul Scherrer Institut
H. Deng: Southern University of Science and Technology
Y. Cai: Southern University of Science and Technology
C. Chen: Southern University of Science and Technology
Y. Jiang: Princeton University
A. Amato: Paul Scherrer Institute
M. Shi: Paul Scherrer Institut
M. Z. Hasan: Princeton University
J.-X. Yin: Southern University of Science and Technology
R. Khasanov: Paul Scherrer Institute
E. Pomjakushina: Paul Scherrer Institut
H. Luetkens: Paul Scherrer Institute

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Charge ordered kagome lattices have been demonstrated to be intriguing platforms for studying the intertwining of topology, correlation, and magnetism. The recently discovered charge ordered kagome material ScV6Sn6 does not feature a magnetic groundstate or excitations, thus it is often regarded as a conventional paramagnet. Here, using advanced muon-spin rotation spectroscopy, we uncover an unexpected hidden magnetism of the charge order. We observe an enhancement of the internal field width sensed by the muon ensemble, which takes place within the charge ordered state. More importantly, the muon spin relaxation rate below the charge ordering temperature is substantially enhanced by applying an external magnetic field. Taken together with the hidden magnetism found in AV3Sb5 (A = K, Rb, Cs) and FeGe kagome systems, our results suggest ubiqitous time-reversal symmetry-breaking in charge ordered kagome lattices.

Date: 2023
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DOI: 10.1038/s41467-023-43503-9

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