Quasi-two-dimensional Fermi surfaces of the heavy-fermion superconductor Ce₂PdIn₈

We report low-temperature de Haas–van Alphen (dHvA) effect measurements in magnetic fields up to 35 T of the heavy-fermion superconductor Ce₂PdIn₈. The comparison of the experimental results with band-structure calculations implies that the 4f electrons are itinerant rather than localized. The cyclotron masses estimated at high field are only moderately enhanced, 8m₀ and 14m₀, but are substantially larger than the corresponding band masses. The observed angular dependence of the dHvA frequencies suggests quasi-two-dimensional Fermi surfaces in agreement with band-structure calculations. However, the deviation from ideal two-dimensionality is larger than in CeCoIn₅, to which Ce₂PdIn₈ bears a lot of similarities. This subtle distinction accounts for the different superconducting critical temperatures of the two compounds.