Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 72: Poster Session: Correlated Electrons
TT 72.74: Poster
Mittwoch, 14. März 2018, 15:00–19:00, Poster B
Electronic Structure of Palladium Measured by Compton Scattering and Electron-Positron Annihilation. — •Josef Helmut Schmidbauer1, Michael Leitner1, and Christoph Pascal Hugenschmidt1,2 — 1Physik Department E21, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany — 2Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstraße 1, 85748 Garching, Germany
Compton scattering and measurements of the angular correlation of electron-positron annihilation radiation (ACAR) offer two unique possibilities for the investigation of the bulk electronic structure. Although both methods allow the measurement of the electron momentum distribution (EMD) various differences are inherent to the respective technique. While a single ACAR spectrum provides a two-dimensional projection of the EMD a Compton scattering profile corresponds to a one-dimensional projections. Besides dissimilar experimental resolution further differences originate from the influence of the positron wave function and the enhancement of different electron states (probe effects). We applied both techniques to the correlated system Palladium in order to study its electronic structure, and we present the specific features inherent to Compton scattering and ACAR.