= Pb, Sn)*

DFT calculations for APd₃ (A=Pb, Sn) recently revealed an interesting band structure [1] that includes: a dispersionless branch along the Γ-X line, that could result in a large DOS near E_F, and Dirac-like surface states. To test these predictions, we synthesized single crystals of PbPd₃ and SnPd₃ using the Czochralski growth technique and performed magnetoresistance and torque magnetometry measurements in magnetic fields up to 45 T. Through analysis of quantum oscillations, we uncover Fermi surface topographies that suggest the E_F is roughly 50 meV above the flat band for PbPd₃. This results in the flat bands only having a weak effect on the bulk properties, while the impact of the Dirac cone at the Γ-point is also limited due to it being several hundred meV above E_F. We will discuss detailed results of the Fermi surface topology measurements and prospects for tuning the E_F to meet either the flat bands or the Dirac cone.
[1] K. Ahn et al, PRB 98, 035130(2018).