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O: Fachverband Oberflächenphysik
O 86: Poster Session - Organic Molecules on Inorganic Substrates: Electronic, Optical and other Properties II
O 86.2: Poster
Mittwoch, 18. März 2020, 18:15–20:00, P2/EG
Pump-Probe Photoelectron Momentum Microscopy of Molecular Thin Films at a Free-Electron Laser — •Christian Metzger1, Markus Scholz2, Kiana Baumgärtner1, Chul-Hee Min1, Thiago R. F. Peixoto1, Dmytro Kutnyakhov3, Michael Heber3, Federico Pressacco4, Wilfried Wurth3,4, Anders Madsen2, and Friedrich Reinert1 — 1Experimentelle Physik 7, Universität Würzburg, Germany — 2European XFEL, Germany — 3DESY Hamburg, Germany — 4Universität Hamburg, Germany
The analysis of the momentum distribution from static angle-resolved photoemission experiments has provided new insights into the electronic interaction at molecule-metal interfaces [1], electron-vibration coupling [2] as well as structural alignment [3] in the last decade [4]. Our pump-probe measurements focus on translating these previous achievements into the time-domain. To this end, we conducted dynamic experiments on pentacene bilayers on top of Ag(110) with a time-of-flight momentum microscope at a free-electron-laser facility [5]. Pentacene is an ideal archetype for this endeavor due to its broad applicability in electronic devices and its well characterized properties in static experiments [6]. Furthermore, it has the potential to showcase a variety of ultrafast photoinduced processes such as singlet fission.
[1] G. Zamborlini et al., Nat. Comm. 8, 335 (2017). [2] M. Graus et al., Phys. Rev. B 98, 195412 (2018). [3] B. Stadtmüller et al., EPL 100, 26008 (2012). [4] P. Puschnig et al., Science 326, 702 (2009). [5] M. Scholz et al., arXiv:1907.10434. [6] M. Grimm et al., Phys. Rev. B 98, 195412 (2018)