EventDetails

Speaker:
Dr Raffael L. Klees Institut für Physik, Universität Augsburg

The understanding of the interplay between magnetism and superconductivity is a
longstanding and fundamental question in condensed matter physics. On the atomic
scale, the interaction of magnetic impurities with Cooper pairs on a superconducting
surface gives rise to sharp spin-polarized in-gap resonances known as Yu-Shiba-Rusinov
(YSR) bound states. Like electron interference patterns in normal metals, YSR states
exhibit periodic textures around magnetic impurities, which often fall below the resolution
limits of even the most advanced scanning tunneling microscopy (STM) techniques.
In this talk, I will discuss recent experimental advancements in STM-based
measurements that reveal rich spatial and energy features, such as the observation of
interference patterns between pairs of YSR states. I will present our latest efforts to
develop an effective theoretical model that captures the essence of these experimental
observations, paving the way for deeper insights into exotic superconducting and
topological phenomena.
Reference: A. Odobesko et al., Sci. Adv. 10, eadq6975 (2024)