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Kagome-net magnets form a popular class of materials for topologically nontrivial magnetic and electronic structures. YMn₆Sn₆ is a prototype of such compounds. It forms an hexagonal P6/mmm structure consisting of kagome planes [Mn3Sn] separated by two inequivalent Sn3 and Sn2Y layers, thereby providing a platform for topological electronic features inherent to the kagome geometry (e.g. Dirac cones), and complex magnet structures arising from the parametric frustration. We have recently realized a series of competing magnetic phases together with a fluctuation-driven topological Hall effect in this compound [1]. Here we present the calculated electronic structure of YMn₆Sn₆ along with de Haas-van Alphen and Shubnikov-de Haas oscillation data in magnetic fields of up to 60 T and temperatures down to 0.5 K. A plethora of oscillations is observed, reflecting the intricate Fermi surface, whilst phase and effective mass analysis hints at the role of Dirac fermions.
[1] Ghimire et al., arXiv:2007.02399.