de Haas-van Alphen effect of correlated Dirac states in kagome metal Fe3Sn2*

We report the study of the de Haas-van Alphen effect in the ferromagnetic kagome metal Fe3Sn2, where massive Dirac electronic states have been identified by spectroscopic means [1,2]. Through magneto-quantum oscillations we observe two quasi-2D Fermi surfaces that are consistent with the quasi-2D double Dirac cone structures. Moreover, these Fermi surfaces appear to change following the rotation of the soft ferromagnetic moment, implying a strong coupling of the Dirac states with the ferromagnetic order through spin-orbit coupling. Finally, these observations establish the bulk nature of the Dirac bands and offer unique insight into lattice-borne topological electronic states. These results are summarized in arxiv/1809.11159 [3].

[1] L. Ye, M. Kang et al., Nature 555, 638-642 (2018)
[2] J. X. Yin et al., Nature 562, 91–95 (2018)
[3] L. Ye et al., arxiv/1809.11159