Berlin 2018 – scientific programme

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MA: Fachverband Magnetismus

MA 58: Surface magnetism II

MA 58.5: Talk

Friday, March 16, 2018, 10:30–10:45, EB 202

Scanning tunneling spectroscopy of 3d transition metal atoms on superconducting Re(0001) — •Lucas Schneider, Manuel Steinbrecher, Levente Rósza, Jens Wiebe, and Roland Wiesendanger — Department of Physics, Hamburg University, 20355 Hamburg, Germany

Yu-Shiba-Rusinov (YSR) bands in chains of magnetic atoms on s-wave superconductors can host Majorana bound states at their ends [1,2]. For the realization of braiding of these states, which is ultimately needed for their usage in quantum computation, the building of controlled nanostructures of chains and an understanding of the coupling of the magnetic atoms to the substrate, are essential ingredients. In this study, different 3d transition metal adatoms were deposited on a superconducting Rhenium substrate which enables atom-by-atom assembly of nanostructures using the tip of a scanning tunneling microscope as a tool to move the atoms on the surface. The YSR states and spin-excitations of the atoms were investigated by inelastic scanning tunneling spectroscopy in comparison to theoretical ab-initio calculations revealing that the YSR state formation crucially depends on the species of atom and its adsorption site.

We acknowledge funding by the ERC via the Advanced Grant ASTONISH (No. 338802).

[1] S. Nadj-Perge et al., Science 346, 6209 (2014). [2] M. Ruby et al., Nano Letters 17, 4473, (2017).