Hidden magnetism uncovered in a charge ordered bilayer kagome material ScV6Sn6
Z. Guguchia, Dariusz Jakub Gawryluk, Soohyeon Shin, Zhanyang Hao, C. Mielke, Debarchan Das, Igor Plokhikh, L. Liborio, J. Kane Shenton, Yong Hu, V. Sazgari, M. Medarde, Hanbin Deng, Yongqing Cai, Kai Chen, Yu-Xiao Jiang, A. Amato, M. Shi, M. Zahid Hasan, Jia‐Xin Yin, R. Khasanov, E. Pomjakushina, H. Luetkens
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 ScV 6 Sn 6 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 A V 3 Sb 5 ( A = K, Rb, Cs) and FeGe kagome systems, our results suggest ubiqitous time-reversal symmetry-breaking in charge ordered kagome lattices.