Quantum oscillations in double Kagome compounds

Materials with kagome lattices have attracted considerable attention due to their exotic electronic properties, such as flat bands, non-trivial topology, and unconventional superconductivity. In this research, the double kagome compounds Pt₃Tl₂, Pt₃In₂, Fe₃Sn₂, and V₃Sb₂ were studied using first-principles (DFT) calculations and tight-binding models. We analyzed how interactions between kagome planes impact the electronic structure and band topology. Irreducible representation analysis suggests the presence of Dirac points along the Γ–A path in Pt₃X₂ (X = Tl, In) compounds. In addition, de Haas–van Alphen (dHvA) oscillation frequencies were calculated from theoretical Fermi surfaces, providing information on the geometry of electronic states near the Fermi level.

We thank DGAPA-UNAM projects IG101124, IA100226 for partial financial support. Calculations were performed in the DGTIC-UNAM Supercomputing Center projects LANCAD-UNAM-DGTIC-150, LANCAD-UNAM-DGTIC-368, and LANCAD-UNAM-DGTIC-422