Abstract
We investigate the nature of Yu-Shiba-Rusinov (YSR) subgap states induced by single manganese (Mn) atoms adsorbed on different surface orientations of superconducting lead (Pb). Depending on the adsorption site, we detect a distinct number and characteristic patterns of YSR states around the Mn atoms. We suggest that the YSR states inherit their properties from the Mn levels, which are split by the surrounding crystal field. The periodicity of the long-range YSR oscillations allows us to identify a dominant coupling of the states to the outer Fermi sheet of the two-band superconductor Pb.
- Received 11 August 2016
DOI:https://doi.org/10.1103/PhysRevLett.117.186801
© 2016 American Physical Society