Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 3: Focus Session: Spins on Surfaces studied by Atomic Scale Spectroscopies I

O 3.6: Vortrag

Montag, 18. März 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