Regensburg 2022 – scientific programme
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O: Fachverband Oberflächenphysik
O 68: Focus Session: Time-Resolved Momentum Microscopy
O 68.3: Talk
Thursday, September 8, 2022, 16:00–16:15, H3
The complete interface molecular movie: One-stop imaging of orbital, electronic, and structural dynamics — •Markus Scholz1, Kiana Baumgärtner2, Marvin Reuner3, Christian Metzger2, Michael Heber1, Dmytro Kutnyakhov1, Friedrich Reinert2, Daria Popova-Gorelova3, Martin Beye1, and Kai Rossnagel4 — 1Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany — 2Experimentelle Physik 7, Julius-Maximilians-Universität, Am Hubland, 97074 Würzburg, Germany — 3I. Institute for Theoretical Physics and Centre for Free-Electron Laser Science, Universität Hamburg, Luruper Chaussee 149, 22607 Hamburg, Germany — 4Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
Reactions of molecules on surfaces involve a complex interplay between electronic reorganization and the motion of atoms. The recent developments of higher-harmonics generation (HHG) and free-electron laser (FEL) based sources open up new opportunities for ultrafast spectroscopy toward simultaneously imaging subtle changes in the electronic structure and atomic positions on a femtosecond time scale and with sub-Ångström spatial resolution. Here, using a dual-electron messenger mode of momentum microscopy, we trace a photoinduced charge transfer process in energy-momentum space using valence electrons and, synchronously, at atomic sites using core electrons, in a single experimental setup for a molecule-2D material interface.