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We report experimentally observed linear dichroism in angle-resolvedcore-level photoemission spectra of PrIr2Zn20 and PrB6 in cubic symmetry. Thedifferent anisotropic 4f charge distributions between the compounds due to thecrystalline-electric-field splitting are responsible for the difference in thelinear dichroism, which has been verified by spectral simulations with the fullmultiplet theory for a single-site Pr3+ ion in cubic symmetry. The observedlinear dichroism and polarization-dependent spectra in two differentphotoelectron directions for PrIr2Zn20 are reproduced by theoretical analysisfor the Gamma_3 ground state, whereas those of the Pr 3d and 4d core levelsindicate the Gamma_5 ground state for PrB6.

Linear dichroism in angle-resolved core-level photoemission spectra reflecting 4f ground-state symmetry of strongly correlated cubic Pr compounds