Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 55: Poster Wednesday: Organic Molecules at Surfaces 2
O 55.9: Poster
Mittwoch, 7. September 2022, 18:00–20:00, P4
Photoemission orbital tomography of NiTPP molecules deposited on the passivated Fe(100)-p(1x1)O surface — •Michael Gutnikov1, David Janas1, Jonah Nitschke1, Mira Arndt1, Vitaliy Feyer2, Giovanni Zamborlini1, and Mirko Cinchetti1 — 1Department of Physics, TU Dortmund University, Otto-Hahn-Straße 4, 44227 Dortmund, Germany — 2Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, Leo-Brandt-Straße, 52425 Jülich, Germany
Recently, it was shown that a single layer of oxygen is sufficient to decouple nickel porphyrins from a ferromagnetic surface, thus, preserving most of the electronic features of the pristine molecules [1]. However, distortions of the molecular structure, e.g. upward-bent phenyl-rings, can make the interpretation of surface imaging techniques like STM extremely challenging.
Additional information can be gained by photoemission tomography (PT), which combines angle-resolved photoelectron spectroscopy (ARPES) with ab-initio calculations of the gas phase molecules to interpret the orbital arrangement of thin molecular layers.
This work provides a characterization of NiTPP molecules on an oxygen passivated Fe(100)-p(1x1)O surface using PT, focusing not only on the energy level alignment but also on their azimuthal orientation with respect to the substrate.
[1] G. Albani et al. Micromachines 12, 191 (2021)