Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 20: PhD Focus Session: Symposium on SStrange Bedfellows – Magnetism Meets Superconductivity" (joint session MA/AKjDPG)

MA 20.3: Hauptvortrag

Dienstag, 17. März 2020, 10:30–11:00, HSZ 04

Yu-Shiba-Rusinov states of single magnetic atoms and nanostructures probed by scanning tunneling spectroscopyEva Liebhaber1, Michael Ruby1, Benjamin W. Heinrich1, Gaël Reecht1, Kai Rossnagel2,3, Felix von Oppen1,4, and •Katharina J. Franke11Freie Universität Berlin, Berlin, Germany — 2Christian-Albrechts-Universität Kiel, Kiel, Germany — 3Deutsches Elektronen Synchrotron, Hamburg, Germany — 4Dahlem Center for Complex Quantum Systems, Berlin, Germany

The exchange coupling of individual magnetic atoms with the Cooper pairs of a superconducting substrate leads to Yu-Shiba-Rusinov (YSR) bound states inside the superconducting energy gap. Their bound state energy and spatial extent can be probed by scanning tunneling spectroscopy [1-4]. Chains of magnetic adatoms have attracted particularly strong attention due to the formation of Majorana bound states at their terminations [5].

Here, we investigate individual magnetic atoms on Pb and 2H-NbSe2 substrates. We observe intriguing patterns of YSR states around the adatoms, which are determined by the adatom’s d-levels as well as local symmetries of the adsorption potential. When the adatoms are sufficiently close, the YSR states hybridize, eventually giving rise to YSR bands in atomic chains.

[1] Yazdani et al., Science 275, 1767 (1997); [2] Ji et al., Phys. Rev. Lett. 100, 226801 (2008); [3] Franke et al., Science 332, 940 (2011); [4] Ménard et al., Nature Phys. 11, 1013 (2015); [5] Nadj-Perge et al., Science 346, 602 (2014).

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden