Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 45: Poster Spins on Surfaces at the Atomic Scale

O 45.15: Poster

Dienstag, 18. März 2025, 18:00–20:00, P2

Properties of magnetic atoms on a hexagonal insulating lattice — •Johannes Schust, Henrik Lichtl, Julian Zeitler, Lukas Arnhold, Sebastian Loth, and Susanne Baumann — University of Stuttgart, Institute for Functional Matter and Quantum Technologies, Stuttgart, Germany

The symmetry of the immediate surrounding of an atom heavily influences its static properties and also governs its dynamics. For the exploration of atomic-scale systems by scanning tunneling microscopy (STM), the choice of a suitable thin film is thus key. While most preceding works take advantage of two- or four-fold underlying symmetries, we focus on the hexagonal surface of zinc oxide (ZnO) monolayers. Hexagonal substrates bear the potential for exploring spin frustration effects on a surface, realized by the assembly of magnetic nanostructures built atom-by-atom. ZnO, as a wide bandgap semiconductor [1], is employed to mitigate electron scattering between the Ag(111) substrate and the adsorbed species on the sample. We develop a reliable method to prepare the aforementioned substrate and carry out comprehensive characterization of cobalt (Co) and manganese (Mn) atoms in the present environment. These efforts provide the foundation for investigating novel dynamical aspects of frustrated systems on the atomic scale.

[1] A. Shiotari et al. J. Phys. Chem. (2014)

Keywords: Scanning Tunneling Microscopy; Spin Frustration; Zinc Oxide; Nanomagnetism