Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 71: Electronic Structure of Surfaces I
O 71.5: Talk
Wednesday, March 18, 2020, 16:15–16:30, REC C 213
Fermi Surface Tomography of Palladium via Momentum Microscopy — •Xin Liang Tan1, Kenta Hagiwara1, Ying-Jiun Chen1,2, Jakub Schusser3, Vitaliy Feyer1, Jan Minar3, Claus M. Schneider1,2, and Christian Tusche1,2 — 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. In addition, relativistic spin-orbit coupling pronounced in heavier elements lifts the degeneracy of the energy bands and further 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. In this talk, we will explore the experimentally determined electronic structure of palladium in four dimensional energy-momentum space (EBinding,kx,ky,kz) obtained via constant initial-state 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.