Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 18: Superconductivity: Poster
TT 18.11: Poster
Montag, 18. März 2024, 15:00–18:00, Poster C
Real-space mapping of Yu-Shiba-Rusinov states around magnetic defects on superconducting surfaces — •Raffaele Aliberti1,2, David Antognini Silva1,2, Adamantia Kosma1, Stefan Bleugel1, and Philipp Ruessmann1,3 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, Jülich, Germany — 2RWTH Aachen University,Aachen, Germany — 3Institute for Theoretical Physics and Astrophysics, University of Würzburg, Würzburg, Germany
Magnetic impurities on superconductors generally give rise to Yu-Shiba-Rusinov (YSR) bound states which, when coupled suitably in chains of magnetic atoms, can give rise to Majorana zero modes. We study the behaviour of YSR states at isolated magnetic impurities and focus on mapping out their spatial extent. In particular, we investigate the interplay of the electronic structure of the superconductor with the extent of resulting YSR states. A better understanding and control of such states can lead to reliably produce superconducting spin qubits, important for topologically protected quantum computers.
In our work we employ the Kohn-Sham Bogoliubov-de Gennes method within the full-potential relativistic Korringa-Kohn-Rostoker Green function method [1,2] interfaced with the AiiDA infrastructure for high-throughput automation [3].
[1] P. Rüßmann and S. Blügel, Phys. Rev. B 105, 125143 (2022).
[2] P. Rüßmann et al., Proc. SPIE 12656, Spintronics XVI, 126560S (2023); https://doi.org/10.1117/12.2678145
[3] P. Rüßmann et al., npj Comput Mater 7, 13 (2021).
Keywords: Superconductivity; Yu-Shiba-Rusinov state; Kohn-Sham Bogoliubov-de Gennes method; density functional theory