David W. Tam

Mar 13, 2024 | nature.com | David W. Tam |Nicola Colonna |Fatima Alarab |Vladimir N. Strocov |Dariusz Gawryluk |Ekaterina Pomjakushina

AbstractWe present high-quality angle-resolved photoemission (ARPES) and density functional theory calculations (DFT+U) of SmCoIn5. We find broad agreement with previously published studies of LaCoIn5 and CeCoIn51,2, confirming that the Sm 4f electrons are mostly localized. Nevertheless, our model is consistent with an additional delocalized Sm component, stemming from hybridization between the 4f electrons and the metallic bands at “hot spot” positions in the Brillouin zone.

Aug 22, 2023 | nature.com | David W. Tam |Nicola Colonna |Neeraj Kumar |Cinthia Piamonteze |Fatima Alarab |Vladimir N. Strocov | +4 more

AbstractThe microscopic mechanism of heavy band formation, relevant for unconventional superconductivity in CeCoIn5 and other Ce-based heavy fermion materials, depends strongly on the efficiency with which f electrons are delocalized from the rare earth sites and participate in a Kondo lattice.