Regensburg 2025 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 45: Poster Spins on Surfaces at the Atomic Scale

O 45.18: Poster

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

Tuning the interaction between spin triplet states at the single-molecule level — Lorenz Meyer, •Maximilian Kögler, Robert Henninger, Nicolas Néel, and Jörg Kröger — Technische Universität Ilmenau, Ilmenau, Germany

In a scanning tunneling microscope junction, two molecular spins - one nickelocene (Nc) decorating the tip and another adsorbed on Pb(111) - are approached toward each other. Simultaneously, inelastic electron tunneling spectra reveal the evolution of spin excitations with increasing magnetic exchange interaction. An avoided energy level crossing occurs at the verge of the Nc-Nc contact. Modeling of the spectra hints at the exchange coupling of tunneling electrons to the Nc spins as the origin. Funding by the DFG through KR 2912/18-1 and KR 2912/21-1 and the BMBF through the ForLab initiative is acknowledged.

Keywords: Scanning tunneling microscopy; Inelastic tunneling spectroscopy; Nickelocene; Molecular spin coupling