Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 55: Poster Wednesday: Organic Molecules at Surfaces 2

O 55.5: Poster

Mittwoch, 7. September 2022, 18:00–20:00, P4

Pentacene on prototypical antiferromagnets: A photoemission study — •Valentin Mischke, David Janas, Giovanni Zamborlini, Jonah E. Nitschke, and Mirko Cinchetti — Department of Physics, TU Dortmund University, Otto-Hahn-Straße 4, 44227 Dortmund, Germany

In the last years, so-called molecular spinterfaces have been intensively studied because of the novel spin properties raising from the molecule-metal hybridization [1]. Recently, antiferromagnets have been considered as an alternative to their ferromagnetic counterparts for the engineering of spinterfaces with novel spin properties. Here, we present the preliminary characterization of a single layer of pentacene atop two prototypical antiferromagnets, namely nickel oxide NiO(111) and iron oxide FeO(100). Both thin films have been grown in-situ, under UHV conditions, by depositing Ni and Fe in a O₂ background atmosphere onto Au(111) and oxygen-passivate Fe(100), respectively. The resulting interfaces have been characterized with low energy electron diffraction and momentum microscopy. In addition, photoemission tomography was employed to determine the energy level alignment of the molecular orbitals at the interface.

[1] Cinchetti, Dediu, Hueso, Nature Materials 16, 507 (2017)