Soft X-ray Fermi surface tomography of palladium and rhodium via momentum microscopy

In this study, we explored the Fermi surface of the 4d noble metals palladium and rhodium obtained via high-resolution constant initial state momentum microscopy. The complete 3D-Fermi surfaces of palladium and rhodium were tomographically mapped using soft X-ray photon energies from 34 eV up to 660 eV. To fully capture the orbital angular momentum of states across the Fermi surface, the Fermi surface tomography was performed using p- and s- polarized light. Applicability and limitations of the nearly-free electron final state model in photoemission are discussed using a complex band structure model supported by experimental evidence. The significance of spin-orbit coupling and electron correlations across the Fermi surfaces will be discussed within the context of the photoemission results. State-of-the-art fully relativistic Korringa-Kohn-Rostoker (KKR) calculations within the one-step model of photoemission are used to support the experimental results.PMID:37586245 | DOI:10.1016/j.ultramic.2023.113820

Source: Ultramicroscopy - August 16, 2023 Category: Laboratory Medicine Authors: Xin Liang Tan Kenta Hagiwara Ying-Jiun Chen Jakub Schusser Iulia Cojocariu Daniel Baranowski Vitaliy Feyer J án Minár Claus M Schneider Christian Tusche Source Type: research