SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session III: Electronic structure of surfaces: Spectroscopy, surface states I

O 36.5: Poster

Dienstag, 2. März 2021, 10:30–12:30, P

Fermi Surface Tomography of Palladium via Momentum Microscopy — •Xin Liang Tan¹, Kenta Hagiwara¹, Ying-Jiun Chen^1,2, Jakub Schusser³, Iulia Cojocariu¹, Vitaliy Feyer¹, Jan Minar³, Claus M. Schneider^1,2, and Christian Tusche^1,2 — ¹Forschungszentrum Jülich, Peter Grünberg Institut, Jülich — ²Fakultät für Physik, Universität Duisburg-Essen, Duisburg — ³New Technologies Research Centre, University of West Bohemia, Pilsen, Czech Republic

The Fermi surfaces, which describe all thermodynamical and transport quantities of solids, of transition metals are often failed to be modeled by one-electron mean-field theory due to strong correlations among the valence electrons. Moreover, relativistic spin-orbit coupling pronounced in heavier elements lifts the degeneracy of the energy bands and modifies the Fermi surface. Palladium, a 4d metal attributed to both significant spin-orbit coupling and electron correlations, is ideal for a systematic and fundamental study on the two fundamental physical phenomena and their interplay in electronic structure. We will explore the experimentally determined electronic structure of palladium in four-dimensional energy-momentum space (E_Binding,k_x,k_y,k_z) obtained via momentum microscopy. The complete 3D-Fermi surface of palladium and corresponding isoenergy surfaces at higher binding energies were tomographically mapped with an energy- and polarization-variable light source. Spin-orbit coupling and electron correlations in palladium will be presented in the context of energy-momentum relations across the Fermi surface and isoenergy surfaces.