Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 52: Poster: Electronic structure: Surface Magnetism and Spin Phenomena
O 52.5: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster B
Yu-Shiba-Rusinov states of Fe adatoms on the quasi 2D superconductor 2H-NbSe2 — •Rojhat Baba1, Eva Liebhaber1, Sebastian Rohlf2, Kai Rossnagel2, Benjamin W. Heinrich1, and Katharina J. Franke1 — 1Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany. — 2Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany.
Magnetic impurities in superconducting materials induce Yu-Shiba-Rusinov (YSR) states inside the superconducting energy gap due to the exchange coupling between the impurity and the Cooper pair condensate. The superconductor 2H-NbSe2 is a transition metal dichalcogenide compound with a strong 2D character because of the weak van der Waals interaction between its layers. Furthermore, the material shows a transition to a charge density wave (CDW) state at low temperatures.
We use low temperature scanning tunneling microscopy and spectroscopy for the investigation of single Fe adatoms on 2H-NbSe2. The Fe adatoms reside in two different adsorption sites which induce significant differences in the energy of the d resonances as well as of the YSR states. A further characterization hints towards an influence of the CDW of the 2H-NbSe2 surface on the energy of the YSR states.