SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 102: Poster Session VIII: Organic molecules on inorganic substrates: electronic, optical and other properties IV

O 102.6: Poster

Donnerstag, 4. März 2021, 13:30–15:30, P

Time-resolved orbital imaging of the CuPc/TiSe₂ interface — •Kiana Baumgärtner¹, Markus Scholz², Christian Metzger¹, Dmytro Kutnyakhov³, Nils Wind⁴, Michael Heber³, Lukas Wenthaus³, Kai Rossnagel^3,5, and Friedrich Reinert¹ — ¹Experimentelle Physik 7, Universität Würzburg, Germany — ²European XFEL, Germany — ³DESY, Hamburg, Germany — ⁴Universität Hamburg, Germany — ⁵Universität Kiel, Germany

In the last decade [1], the interpretation of the momentum distribution from static angle-resolved photoemission experiments has improved our understanding of charge transfer processes at the molecule-substrate interface [2] as well as the geometric alignment in these systems [3]. In this contribution I will present our experimental findings on time-resolved orbital imaging of the excited CuPc/TiSe₂ interface which were conducted at a HHG-laser facility with a momentum microscope. Previous studies on the transition-metal dichalcogenide TiSe₂ have shown exciting electronic behavior on the fs to ps time scale upon optical excitation [4]. With the introduction of CuPc as a charge donor new interaction channels arise at the interface and showcase the electronic as well as structural interplay at the interface. [1] P. Puschnig et al., Science 326, 702 (2009). [2] G. Zamborlini et al., Nat. Comm. 8, 335 (2017). [3] M. Grimm et al., Phys. Rev. B 98, 195412 (2018). [4] T. Rohwer et al., Nature 471, 490 (2011).