Advances in photoemission spectroscopy of f-electron materials

Abstract The recent capability to perform angle-resolved photoemission spectroscopy (ARPES) with improved energy and angle resolution over a wide photon energy range has provided new information about f-electron systems. Results for two rather different systems, 5f-electron heavy fermion metal URu 2 Si 2 and 4f-electron mixed-valent SmB 6 are compared and contrasted.