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O: Fachverband Oberflächenphysik

O 51: Poster: Electronic Structure of Surfaces: Spectroscopy, Surface States

O 51.15: Poster

Tuesday, March 13, 2018, 18:15–20:30, Poster B

Pb single atom contacts in a STM — •Jan Homberg, Alexander Weismann, and Richard Berndt — Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany

In scanning tunneling spectroscopy, superconducting tips may be used to achieve high energy resolution not limited by Fermi broadening. Here we use Pb tips on a Pb(100) single crystal to investigate single atom contacts. Multiple Andreev Reflections as well as Josephson supercurrents are observed and analysed giving insight into the electronic properties of the contacts.