Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 53: Poster Wednesday: Spins and Magnetism

O 53.4: Poster

Mittwoch, 7. September 2022, 18:00–20:00, P4

Yu-Shiba-Rusinov states of Mn on Pb(110) — •Bharti Mahendru, Martina Trahms, Gaël Reecht, and Katharina J. Franke — Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

Unpaired electron spins exchange coupled to a superconductor give rise to bound states inside the superconducting energy gap and are called Yu-Shiba-Rusinov (YSR) states. Previously, it has been shown that the crystal-field splits singly-occupied d levels of Mn atoms on Pb surfaces, which leads to distinct YSR states inheriting the symmetry of the spin-carrying orbital [1,2].
Here we investigate single atoms and chains of Mn on a Pb(110) surface using scanning tunneling microscopy and spectroscopy. We find different adsorption sites of the individual Mn atoms and chains, which can be distinguished by different YSR states. Some of the Mn sites show a bistability in the presence of the STM tip, while some of the YSR states are also influenced by the tip position.

[1] Michael Ruby, et al., Phys. Rev. Lett. 117, 186801, 2016

[2] Michael Ruby, et al., Phys. Rev. Lett. 120, 156803, 2018