Quantum oscillations in thin films of antiferromagnetic kagome metal FeSn

FeSn is an antiferromagnetic metal, consisting of two-dimensional layers of corner-sharing triangles of Fe, separated by honeycomb Sn spacer layers. This geometrical arrangement of Fe atoms, known as the kagome lattice, is predicted to give rise to Dirac fermions and topological flat bands. Recent photoemission and quantum oscillation studies on FeSn bulk single crystals have experimentally confirmed the existence of these features in their electronic structures [1]. Here we report the quantum oscillation studies on thin films of FeSn. The observed oscillation frequency reproduces the previous measurements on FeSn bulk single crystals. Temperature and field-angle dependent oscillation frequencies respectively reveal the scattering timescale and morphology of the observed Fermi pocket. The realization of high quality FeSn thin films offers a promising platform to explore the interplay of magnetism and electronic topology via quantum confinement or electrostatic gating [2].
References:
[1] M. Kang, L. Ye, et al., arXiv:1906.02167 (2019)
[2] H. Inoue, M. Han, et al., Appl. Phys. Lett. 115, 072403 (2019)