Berlin 2024 – scientific programme
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O: Fachverband Oberflächenphysik
O 3: Focus Session: Spins on Surfaces studied by Atomic Scale Spectroscopies I
O 3.6: Talk
Monday, March 18, 2024, 12:00–12:15, MA 004
Ligand-mediated Yu-Shiba-Rusinov states of a S=1/2 molecule — •Lukas Arnhold1, Matteo Briganti2, Andrea Sorrentino3, Nicolaj Betz1, Lorenzo Poggini4, Jaisa Fernandez Soarez5, Luana C. de Camargo5, Giulia Serrano3, Matteo Mannini2, Federico Totti2, Roberta Sessoli2, Susanne Baumann1, and Sebastian Loth1 — 1University of Stuttgart, Institute for Functional Matter and Quantum Technologies, Stuttgart, Germany — 2Department of Chemistry Ugo Schiff, University of Florence, Italy — 3Department of Industrial Engineering, University of Florence, Italy — 4Institute of Chemistry of OrganoMetallic Compounds - CNR, Florence, Italy — 5Department of Chemistry, Federal University of Paraná, Brazil
We couple ((*8-cyclooctatetraene)(*5-cyclopentadienyl)titanium) (CpTicot) molecules to superconducting Pb nanoislands on Si(111) in a scanning tunneling microscope (STM). This molecular magnet features a well isolated S=1 /2 ground state and is a prime candidate for molecular qubit applications due to exceptional spin coherence times in frozen solution [1]. On Pb nanoislands it exhibits a single YSR state stemming from a singly occupied molecular orbital (SOMO). We find that the molecule's spin interacts with the Pb surface via the cyclooctatetraene ligand making it possible to link the electronic properties of the molecule quantitatively to the in-gap YSR states both in theory and experiment. This experiment gives insights into chemical design priciples for targeted applications of YSR states. [1] de Camargo, L., et al. Angewandte Chemie. 60, Issue 5, 2588-2593
Keywords: scanning tunneling microscopy; Yu-Shiba-Rusinov; Molecular Magnetism; Superconductivity