Dresden 2020 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 25: Bio- and Molecular Magnetism (joint session MA/CPP)

CPP 25.4: Vortrag

Montag, 16. März 2020, 15:45–16:00, HSZ 101

Chemical Doping of Individual Polynuclear Molecular Magnets on Surfaces — •Fabian Paschke1, Vivien Enenkel1, Tobias Birk1, Jan Dreiser2, and Mikhail Fonin11Fachbereich Physik, Universitaet Konstanz, 78457 Konstanz, Germany — 2Swiss Light Source, 5232 Villigen PSI, Switzerland

The controlled deposition, characterization and manipulation of single molecule magnets (SMMs) on surfaces is one of the crucial topics to investigate with regard to their possible implementation as units in future electronic and spintronic devices. Fe4 derivatives are among the most investigated SMMs showing a giant spin and a variety of quantum mechanical phenomena. We showed that a flat derivative of this SMM is suitable for defined adsorption on decoupling monatomic layers of h-BN and graphene [1,2]. We proved the robust molecular magnetism to be retained on a global and single molecule scale, even on metallic substrates [2-4]. In order to manipulate electronic and magnetic properties of individual SMMs chemical doping with alkali atoms has shown to be a feasible technique [5]. Unfortunately, large polynuclear compounds like Fe4 can host numerous adsorption sites for dopants. Here we present successful chemical doping with a defined adsorption configuration for the prototypical Fe4 SMM and study the effect on its electronic and magnetic properties.

[1] P. Erler et al., Nano Lett. 15, 4546 (2015). [2] L. Gragnaniello et al., Nano Lett. 17, 7177 (2017). [3] F. Paschke et al., ACS Nano 13, 780 (2019). [4] F. Paschke et al., submitted (2019). [5] C. Krull et al., Nat. Mat. 12, 337 (2013).

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