Regensburg 2019 – scientific programme

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O: Fachverband Oberflächenphysik

O 44: Poster Tuesday: Spins and Magnetism

O 44.1: Poster

Tuesday, April 2, 2019, 18:00–20:00, Poster D

Yu-Shiba-Rusinov States of iron dimers on 2H-NbSe₂ — •Jannik Steinborn¹, Eva Liebhaber¹, Gaël Reecht¹, Sebastian Rohlf², Kai Rossnagel², and Katharina J. Franke¹ — ¹Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — ²Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany

A magnetic impurity absorbed on a superconductor leads to bound states (called Yu-Shiba-Rusinov (YSR) states) in the superconducting energy gap. These states are caused by exchange scattering between Cooper pairs and the magnetic impurity. 2H-NbSe₂ is a transition metal dichalcogenide with Van-der-Waals coupled layers. In this material superconductivity and a charge density wave (CDW) coexist at low temperatures.

Here, we investigate the YSR states of iron dimers on the surface of 2H-NbSe₂ with low temperature scanning tunneling microscopy and spectroscopy. We examine the coupling of the YSR states of the two iron atoms and the influence of the CDW.