Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 29: Poster: 2D Materials

O 29.8: Poster

Dienstag, 19. März 2024, 12:30–14:30, Poster A

Properties and modification of antimonene on Ag(111) — •Felix Otto, Leon Bojunga, Christian Haberland, Jonas Brandhoff, Maximilian Schaal, Marco Gruenewald, and Torsten Fritz — Institute of Solid State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany

The search for novel two-dimensional (2D) materials with beneficial structural, electronic or optical properties is of great interest for many researchers as well as, to an increasing extend, for industry. For this reason, we investigate the properties of antimonene on Ag(111) with respect to the adsorption of organic molecules as well as atoms.

These were in a first part investigated by using the organic molecule 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA), which has well-known properties and serves as a sensor for the decoupling properties of the Sb-films. For this, differential reflectance spectroscopy (DRS) together with photoelectron spectroscopy (PES) was performed. This yields a classification of the PTCDA-Sb interaction in comparison to other substrates.

In a second part we modified the Sb on Ag(111) system by the deposition of phosphorous in order to grow an inorganic 2D heterolayers. However, we will show by low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM) measurements that phosphorous did not form ordered films on top of Sb. Instead, our structural and electronic characterization revealed that P is able to form an ordered intermediate layer below α-antimonene.

Keywords: Antimonene; Blue Phosphorene; epitaxial growth; scanning tunneling microscopy; photoelectron spectroscopy