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MA: Fachverband Magnetismus

MA 3: Quantum Magnets and Molecular Magnets (joint session TT/MA)

MA 3.11: Vortrag

Montag, 12. März 2018, 12:15–12:30, H 3010

Andreev transport through single-molecule magnets — •Filip Pawlicki and Ireneusz Weymann — Faculty of Physics, Adam Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland

Transport characteristics of a single molecule magnet coupled to two ferromagnetic and one superconducting lead are studied theoretically by means of the real-time diagrammatic technique. The coupling to the ferromagnets is assumed to be weak, while the coupling to the superconductor can be arbitrary. The quantities of interest include the Andreev current, differential conductance, tunnel magnetoresistance (TMR) and current cross-correlations. It is shown that the system exhibits splitting of Andreev states due to additional degrees of freedom of the molecule. The TMR and current cross-correlations are used to quantify the contribution of crossed and direct Andreev reflections to the current. We also compare our results to those obtained for a quantum dot in a similar three-terminal setup and discuss the possibility of using molecules for Cooper pair splitting.