Quantum materials with a kagome lattice structure are a promising platform for condensed matter research due to their peculiar topological, electronic, and magnetic properties. Fe₃Sn₂ is an intermetallic compound where kagome layers of Fe₃Sn and 2D honeycomb Sn layers (stanene) are stacked on top of each other in the layered fashion. The experimental electronic structure studies of the bulk single crystals of Fe₃Sn₂ revealed existence of massive Dirac fermions [1] and not obvious signatures of the flat bands [2].

During the talk, I will present the results of our investigations of the electronic band structure of the thin films of Fe₃Sn₂. The films were grown by molecular beam epitaxy on Pt(111) and characterized using a multi-technique approach, including x-ray photoemission spectroscopy (XPS), x-ray diffraction (XRD), scanning tunneling microscopy (STM) and conversion electron Mössbauer spectroscopy (CEMS). The electronic band structure was measured using angle-resolved photoemission (ARPES) at the Phelix end station of the Solaris synchrotron in Krakow. I will present the obtained experimental results and confront them with the theoretical calculations of the electronic band structure performed using density functional theory (DFT) within generalized gradient approximation (GGA) as well as using GW method. I will also discuss the magnetic properties of the studied films.    

1. Ye et al. Nature 555, 638 (2018)
2. Lin et al. Phys. Rev. Lett. 121, 096401 (2018)