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O: Fachverband Oberflächenphysik
O 68: Poster Session V: Poster to Mini-Symposium: Manipulation and control of spins on functional surfaces I
O 68.5: Poster
Wednesday, March 3, 2021, 10:30–12:30, P
Local electronic structure of lanthanide metallofullerene single-molecule magnets — •Tobias Birk1, Fabian Paschke1, Alexey Popov2, and Mikhail Fonin1 — 1Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — 2Leibniz Institute for Solid State and Materials Research, Helmholtzstr. 20, 01069 Dresden, Germany
Dimetallofullerenes with single-electron lanthanide-lanthanide (Ln-Ln) bonds are new promising single-molecule magnets with exceptional robustness and high blocking temperatures up to 25 K [1]. These molecules are well suited for STM based magnetization relaxation and spin excitation measurements due to their high blocking temperature and exceptional stability.
Here we present the first successful deposition of the lanthanide metallofullerene single-molecule magnet Dy2@C80(CH2Ph) on graphene/Ir(111) using electrospray deposition (ESD). Scanning tunneling microscopy (STM) and spectroscopy (STS) measurements are performed in order to study ordering behavior and electronic properties on this weak coupling substrate. The observation of LUMO resonances in combination with varying topographic appearances reveal different adsorption configurations of the molecules on the surface. Additional comparison between molecules with Dy and Er atoms as magnetic centers show a shift in LUMO energies proving that electron tunneling mediated by the single-electron Ln-Ln bond is possible.
[1] F. Liu et al. Nat Commun 10, 571 (2019).