Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 46: Poster Organic Molecules on Inorganic Substrates: Electronic, Optical and Other Properties

O 46.8: Poster

Tuesday, March 18, 2025, 18:00–20:00, P2

Spectroscopic study of the interface between organic molecules and platinum telluride thin films — •Lorenz Klein, Hibiki Orio, Romana Ganser, Muthu P. T. Masilamani, Maximilian Ünzelmann, and Friedrich Reinert — Universität Würzburg, Experimentelle Physik VII & Würzburg-Dresden Cluster of Excellence, Würzburg, Germany

Van der Waals heterostructures of organic molecules and transition metal chalcogenides (TMCs) represent excellent model systems for the study of weak molecule-substrate interactions.

Here, we use two phases of metallic platinum telluride, which both host spin-polarized surface states in their electronic surface band structures. Using those as substrates, we deposit copper phthalocyanine (CuPc) and study the resulting atomic and electronic interface structure by means of x-ray (XPS) and angle-resolved photoemission spectroscopy (ARPES) as well as low-energy electron diffraction (LEED). On that basis, we discuss the differences in surface ordering, work function, and the binding energies of the observed molecular features.

Keywords: ARPES, TMCs, organic molecules