Hidden magnetism uncovered in a charge ordered bilayer kagome material ScV<sub>6</sub>Sn<sub>6</sub>
ORAL
Abstract
Charge ordered kagome lattices have been demonstrated to be intriguing platforms for studying the intertwining of topology, correlation, superconductivity and magnetism [1-4]. The recently discovered charge ordered kagome material ScV6Sn6 [5] does not feature a magnetic groundstate or excitations, thus it is often regarded as a conventional paramagnet. In this talk, I will present the results of muon-spin rotation and magnetotransport experiments, uncovering an unexpected hidden magnetism of the charge order [6]. We observe a striking enhancement of the internal field width sensed by the muon ensemble, which takes place within the charge ordered state. More remarkably, 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) [1-3] and FeGe [4] kagome systems, our results suggest ubiqitous time-reversal symmetry-breaking in charge ordered kagome lattices. This is substantiated by our very recent discovery of above room-temperature charge order and its magnetic response in a prototypical kagome superconductor LaRu3Si2 [7].
[1] B. Ortiz, et al. Phys. Rev. Lett. 125, 247002 (2020).
[2] C. Mielke III, D. Das, et al. and Z. Guguchia. Nature 602, 245-250 (2022).
[3] Z. Guguchia et al. Nature Communications 14, 153 (2023).
[4] J.-X. Yin et al. Phys. Rev. Lett. 129, 166401 (2022).
[5] H.W.S. Arachchige, et al. Phys. Rev. Lett. 129, 216402 (2022).
[6] Z. Guguchia et al. arXiv:2304.06436v1 (2023).
[7] I. Plokhikh, et al. and Z. Guguchia. arXiv:2309.09255 (2023).
[1] B. Ortiz, et al. Phys. Rev. Lett. 125, 247002 (2020).
[2] C. Mielke III, D. Das, et al. and Z. Guguchia. Nature 602, 245-250 (2022).
[3] Z. Guguchia et al. Nature Communications 14, 153 (2023).
[4] J.-X. Yin et al. Phys. Rev. Lett. 129, 166401 (2022).
[5] H.W.S. Arachchige, et al. Phys. Rev. Lett. 129, 216402 (2022).
[6] Z. Guguchia et al. arXiv:2304.06436v1 (2023).
[7] I. Plokhikh, et al. and Z. Guguchia. arXiv:2309.09255 (2023).
*Z.G. acknowledges support from the Swiss National Science Foundation (SNSF) through SNSF Starting Grant (No. TMSGI2_211750).
Publication: C. Mielke III, D. Das, et al. and Z. Guguchia. Nature 602, 245-250 (2022).
Z. Guguchia et al. Nature Communications 14, 153 (2023).
Z. Guguchia et al. arXiv:2304.06436v1 (2023).
Z. Guguchia et al. NPJ Quantum Materials 8, 41 (2023).
I. Plokhikh, et al. and Z. Guguchia. arXiv:2309.09255 (2023).
Presenters
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Zurab Guguchia
- Paul Scherrer Institute
- soohyeon.shin@psi.ch