Investigation of the band structure and Fermi surface effects in the Sb-doped CeCuBi2 heavy fermion compounds studied by ARPES

Ce-based intermetallic compounds have interesting physical properties that arise from the interplay between Ruderman-Kittel-Kasuya-Yoshida (RKKY) magnetic interaction, crystalline electric field and Fermi surface (FS) effects in connection to a strong hybridization between the Ce3+ 4f electrons and the conduction electrons. Ce-based materials often present non-trivial ground states, such as heavy fermion, unconventional superconductivity and non-Fermi-liquid behavior, which frequently appear in the vicinity of a magnetically ordered state [1].
In this work, we will present ARPES studies on the heavy fermion CeCuBi2-xSbx series performed at Cassiopée Beamline at Soleil Syncrotron in France. We intend to show the band structure and Fermi surface modifications on these compounds. In particular, we will show the differences between the CeCuBi2 parent compound, which presents interesting band structure with the presence of Dirac-like cones and band splitting, with the Sb-doped samples, that show important modifications of the magnetic structure and CEF wave functions that cause changes of the FS via the hybridization of the 4f electrons and the conduction bands.