Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 87: Poster Session - Nanostructures at Surfaces: 1D and 2D Structures and Networks
O 87.4: Poster
Mittwoch, 18. März 2020, 18:15–20:00, P2/1OG
Coupling of Yu-Shiba-Rusinov states on 2H-NbSe2 — •Eva Liebhaber1, Lisa Rütten1, Gaël Reecht1, Kai Rossnagel2,3, Felix von Oppen1,4, and Katharina J. Franke1 — 1Fachbereich Physik, Freie Universität Berlin, Germany. — 2Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Germany. — 3Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany. — 4Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, Germany.
A magnetic impurity adsorbed on a superconducting substrate leads to the formation of Yu-Shiba-Rusinov (YSR) states. These are low-energy bound states inside the superconducting energy gap. YSR wave functions of two adjacent magnetic adatoms can hybridize and form symmetric and antisymmetric linear combinations. Increasing the number of adatoms leads to the formation of Shiba bands. In adatom chains, the spin texture and hence, the underlying physics, is dictated by the inter-atomic distance as well as by the nature of the coupling [1].
We investigate magnetic atoms on the superconductor 2H-NbSe2 which is a layered van der Waals material. Its strong 2D character leads to a large spatial extent of the YSR wave functions facilitating the coupling between them [2]. We assemble adatom chains with different interatomic spacings using a superconducting tip and track the evolution of the YSR states.
[1] F. Pientka et al., Phys. Rev. B 89, 180505 (2014).
[2] G.C. Ménard et al., Nature Phys. 11, 1013 (2015).