SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 7: Spins on Surfaces at the Atomic Scale I

O 7.2: Vortrag

Montag, 27. März 2023, 11:00–11:15, REC C 213

Tailoring Yu-Shiba-Rusinov bands in a Kagome lattice by molecular self-assembly — •Laetitia Farinacci, Gael Reecht, Nils Bogdanoff, Benjamin W. Heinrich, Felix von Oppen, and Katharina J. Franke — Freie Universitaet Berlin, Germany

Coupling of magnetic bound states in superconductors (so-called Yu-Shiba-Rusinov or YSR states) leads to fascinating phenomena; such as the formation of topological states. Bottom up approaches allow for a precise characterization of the coupling parameters, shedding light onto the formation of YSR bands and their properties. Most studies so far rely on atom manipulation, which is time demanding and typically limits the size of the systems to below a hundred sites.

Here, we show that self-assembly of Fe-porphine-chloride (FePCl) molecules on Pb(111) can be controlled by varying the sample temperature during and after molecular deposition. In particular, we show that we can obtain islands in which the FeP molecules arrange in a Kagome lattice or in its precursors. This way, we can, on the one hand, characterize the YSR hybridization with molecular precision and, on the other hand, study the long-range band formation across 2D islands.