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TT: Fachverband Tiefe Temperaturen

TT 31: Correlated Electrons: Other Materials

TT 31.2: Vortrag

Dienstag, 21. März 2017, 14:15–14:30, HSZ 103

Electronic Structure of Palladium Determined by Compton Scattering and Electron-Positron Annihilation — •Josef Helmut Schmidbauer, Josef Andreas Weber, Michael Leitner, and Christoph Hugenschmidt — Heinz Maier-Leibnitz Zentrum (MLZ) and Physik Department E21, Technische Universität München, Lichtenbergstraße 1, 85748 Garching, Germany

Compton scattering and the measurement of the angular correlation of electron-positron annihilation radiation (ACAR) offer two complementary techniques for the investigation of the electronic structure of materials. We applied both methods to determine the bulk electron momentum distribution of the 4d transition element palladium. By reconstructing the full Fermi surface from 2D-ACAR projections we reveal all major features of the Fermi surface, predicted by theoretical calculations. Based on our experimental findings and by comparison with theory we discuss correlation effects in Palladium. Moreover, we examine the shape of the so-called L-hole pocket in order to compare the results of different theoretical calculation schemes.