Planar Schottky tunneling spectroscopy of antiferromagnetic kagome metal FeSn

The kagome lattice has long been regarded as a conceptual lattice network that connects its characteristic atomic arrangement to unusual singularities in the electronic structure. The recent discovery of Dirac dispersions and flat bands in transition metal stannide T-Sn (T = Fe, Co) kagome compounds has brought the long-sought theoretical framework into realistic material systems [1]. Here we report the surface-sensitive planar tunneling spectroscopy of antiferromagnetic kagome metal FeSn across a Schottky heterointerface with an n-type degenerate semiconductor [2, 3]. We present measurements across a wide range of temperatures, barrier widths, and magnetic fields probing the underlying electronic structure. We also discuss the relevance of our results to potential applications for spintronic devices.
References:
[1] M. Kang, L. Ye et al., Nat. Mater. 19, 163 (2020)
[2] H. Inoue, M. Han et al., Appl. Phys. Lett. 115, 072403 (2019)
[3] M. Han, H. Inoue et al., in preparation (2020)