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With the advanced investigations into low-dimensional systems, it has become essential to find materials having interesting lattices that can be exfoliated down to monolayer. One particular important structure is a kagome lattice with its potentially diverse and vibrant physics. We report a van-der-Waals kagome lattice material, Pd 3 P 2 S 8,  with several unique properties such as an intriguing flat band. The flat band is shown to arise from a possible compact-localized state of all five  4d  orbitals of Pd. The diamagnetic susceptibility is precisely measured to support the calculated susceptibility obtained from the band structure. We further demonstrate that Pd 3 P 2 S 8  can be exfoliated down to monolayer, which ultimately will allow the possible control of the localized states in this two-dimensional kagome lattice using the electric field gating.

Kagome van-der-Waals Pd3P2S8 with flat band