Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 80: Focus Session: Atomic-Scale Studies of Spins on Surfaces with Scanning Tunneling Microscopy 3
O 80.2: Vortrag
Freitag, 9. September 2022, 10:45–11:00, S051
Local access to the Ln-Ln bonding orbital in dimetallofullerene molecular magnets — •Fabian Paschke1, Tobias Birk1, Fupin Liu2, Stanislav M. Avdoshenko2, Alexey A. Popov2, and Mikhail Fonin1 — 1Department of Physics, Universität Konstanz, 78457 Konstanz — 2Leibniz Institute for Solid State and Materials Research (IFW Dresden), 01069 Dresden
One of the key players in the single-molecule magnet community are members of the lanthanide (Ln) dimetallofullerene family that combine air-stable chemical robustness, easy functionalization, a large magnetic moment and slow magnetic relaxation up to 28 K [1]. Two Ln3+ ions are ferromagnetically coupled by a singly occupied Ln – Ln bonding orbital in the void of a C80 fullerene cage. In this talk I will first demonstrate the robust on-surface magnetism of {Ln2} complexes that show outstanding magnetic blocking temperatures [2,3], an important prerequisite to address its molecular magnetism on a local scale. Subsequently, scanning tunneling spectroscopy unambiguously identifies the unoccupied component of the single-electron Ln – Ln bonding orbital in the spectrum of {Dy2} on a graphene/Ir(111) surface [4]. This finding outlines a new route how to access the molecular spin dynamics of single {Ln2} complexes and provides a working point for spin manipulation using chemical doping.
[1] F. Liu et al., Nat. Commun. 10, 571 (2019). [2] F. Paschke et al., Adv. Mater. 2102844 (2021). [3] L. Spree et al., Adv. Funct. Mater. 2105516 (2021). [4] F. Paschke et al., Small 2105667 (2022).