Deutsche Physikerinnentagung 2026

Atomic-scale spectroscopy of magnetic nanostructures on superconductors

29 Sept 2026, 16:00

30m

Room 280 (Building 46)

Invited Talk Superconductivity Scientific Session VII (Invited talk Katharina Franke)

Speaker

Katharina Franke (Fachbereich Physik and Halle-Berlin-Regensburg Cluster of Excellence CCE, Freie Universität Berlin, Germany)

Description

In addition to being an ideal tool for imaging and manipulating atoms and molecules on surfaces, the potential of the scanning tunneling microscope (STM) for high-resolution spectroscopy has been recognized in the fields of single-molecule physics, magnetism, and superconductivity.

Here, we use the STM to resolve the interplay of magnetic atoms and molecules with superconducting substrates. The magnetic adsorbates induce bound states, so-called Yu-Shiba-Rusinov (YSR) states, within the superconducting energy gap. These states provide a wide range of opportunities for engineering hybridized states, band formation, and topology. We exploit flexible molecular structures, molecular self-assembly and atomic manipulation to showcase the exquisite control over the corresponding quantum states [1-5].

References

[1] E. Liebhaber, L. M. Rütten, G. Reecht, J. F. Steiner, S. Rohlf, K. Rossnagel, F. von Oppen, K. J. Franke, Nat. Commun. 13, 2160 (2022).
[2] L. M. Rütten, H. Schmid, W. M. J. van Weerdenburg, E. Liebhaber, K. Rossnagel, K. J. Franke, Phys. Rev. B 111, 205424 (2025).
[3] L. M. Rütten, E. Liebhaber, G. Reecht, K. Rossnagel, K. J. Franke, Nanoscale 17, 26811 (2025).
[4] L. M. Rütten, H. Schmid, E. Liebhaber, G. Franceschi, A. Yazdani, G. Reecht, K. Rossnagel, F. von Oppen, K. J. Franke, ACS Nano 18, 30798 (2024).
Oppen, K. J. Franke, ACS Nano 18, 30798 (2024).
[5] L. Farinacci, G. Reecht, F. von Oppen, K. J. Franke, Nat. Commun. 15, 6474 (2024).