Kagome compounds Pt₃Tl₂and Pt₃In₂, their Fermi surface and dHvA frequencies

Kagome materials have an interesting electronic structure due to atomic positions producing high degree of electron localisation at the edges of hexagons. This behaviour can be observed at the band structure as flat bands. Pt atoms of Pt₃Tl₂ and Pt₃In₂ shape four Kagome lattices on their unit cell. We calculate and compare the electronic structure of these two compounds: Projected band structure, density of states and Fermi surface. For the latter, we extract the extremal areas and calculate the de Haas-van Alphen frequencies.