Fatima Alarab

Sep 4, 2024 | nature.com | Xiaoyang Chen |Tianlun Yu |Meng Zhang |Fatima Alarab |Vladimir N. Strocov |Yilin Wang | +5 more

AbstractEmergent superconductivity at the LaAlO3/KTaO3 interfaces exhibits a mysterious dependence on the KTaO3 crystallographic orientations. Here by soft X-ray angle-resolved photoemission spectroscopy, we directly resolve the electronic structure of the LaAlO3/KTaO3 interfacial superconductors and the non-superconducting counterpart. We find that the mobile electrons that contribute to the interfacial superconductivity show strong k⊥ dispersion.

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.

Jan 21, 2024 | onlinelibrary.wiley.com | Paul Rosenberger |Lutz Baumgarten |Fatima Alarab |Pia M. Düring

Oxide electronics provide the key concepts and materials for enhancing silicon-based semiconductor technologies with novel functionalities. However, a basic but key property of semiconductor devices still needs to be unveiled in its oxidic counterparts: the ability to set or even switch between two types of carriers - either negatively (n) charged electrons or positively (p) charged holes.

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.