Electronic band structure of Pr-based filled skutterudite antimonides

Filled skutterudites exhibit a wide range of strongly correlated electron phenomena including heavy fermion, superconductivity, non-Fermi liquid and quantum critical behaviors. Knowledge of the electronic structures of these materials is almost entirely from band calculations and dHvA studies. We present the first angle-resolved photoemission spectroscopy (ARPES) measurements of the filled skutterudites antimonides: PrOs$_{4}$Sb$_{12}$ and PrRu$_{4}$Sb$_{12}$. Band dispersions and Fermi surface maps of these three-dimensional materials will be discussed and compared to available LDA band structure calculations.