Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 61: Correlated Electrons: (General) Theory 2
TT 61.5: Vortrag
Donnerstag, 23. März 2017, 10:30–10:45, HSZ 204
Electronic Correlations in Vanadium Revealed by Electron-Positron Annihilation Measurements — Josef Andreas Weber1, Diana Benea2, Wilhelm Hans Appelt3,4, Hubert Ceeh1, Wolfgang Kreuzpaintner1, Michael Leitner1,5, Dieter Vollhardt6, Christoph Hugenschmidt1,5, and •Liviu Chioncel4,6 — 1Physik-Department, Technische Universität München, James-Franck Strasse, 85748 Garching, Germany — 2Faculty of Physics, Babes-Bolyai University, Kogalniceanustr 1, 400084 Cluj-Napoca, Romania — 3Theoretical Physics II, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany — 4Augsburg Center for Innovative Technologies, University of Augsburg, 86135 Augsburg, Germany — 5Heinz Maier-Leibnitz Zentrum, Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany — 6Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
The electronic structure of vanadium measured by Angular Correlation of electron-positron Annihilation Radiation (ACAR) is compared with the predictions of the combined Density Functional and Dynamical Mean-Field Theory (DMFT). Reconstructing the momentum density from five 2D projections we were able to determine the full Fermi surface and found excellent agreement with the DMFT calculations. In particular, we show that the local, dynamic self-energy corrections contribute to the anisotropy of the momentum density and need to be included to explain the experimental results.