Density-functional description of materials for topological qubits and superconducting spintronics

Medientyp: Elektronischer Konferenzbericht
Titel: Density-functional description of materials for topological qubits and superconducting spintronics
Beteiligte: Rüßmann, Philipp [Verfasser:in]; Antognini Silva, David [Verfasser:in]; Hemmati, Mohammad [Verfasser:in]; Klepetsanis, Ilias [Verfasser:in]; Trauzettel, Björn [Verfasser:in]; Mavropoulos, Phivos [Verfasser:in]; Blügel, Stefan [Verfasser:in]
Erschienen: SPIE, 2023
Erschienen in: SPIE 126560S (2023). doi:10.1117/12.2678145 ; Spintronics XVI, San Diego, United States, 2023-08-20 - 2023-08-25
Sprache: Englisch
DOI: https://doi.org/10.1117/12.2678145; https://doi.org/10.34734/FZJ-2023-05766
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Beschreibung: Interfacing superconductors with magnetic or topological materials offers a playground where novel phenomena like topological superconductivity, Majorana zero modes, or superconducting spintronics are emerging. In this work, we discuss recent developments in the Kohn-Sham Bogoliubov-de Gennes method, which allows to perform material-specific simulations of complex superconducting heterostructures on the basis of density functional theory. As a model system we study magnetically-doped Pb. In our analysis we focus on the interplay of magnetism and superconductivity. This combination leads to Yu-Shiba-Rusinov (YSR) in-gap bound states at magnetic defects and the breakdown of superconductivity at larger impurity concentrations. Moreover, the influence of spin-orbit coupling and on orbital splitting of YSR states as well as the appearance of a triplet component in the order parameter is discussed. These effects can be exploited in S/F/S-type devices (S=superconductor, F=ferromagnet) in the field of superconducting spintronics.
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