Contribution to a conference proceedings

FZJ-2023-05766

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Density-functional description of materials for topological qubits and superconducting spintronics

Rüßmann, P. (Corresponding author)FZJ* ; Antognini Silva, D.FZJ* ; Hemmati, M.FZJ* ; Klepetsanis, I.FZJ* ; Trauzettel, B. ; Mavropoulos, P. ; Blügel, S.FZJ* ; Wegrowe, J.-E. (Editor) ; Razeghi, M. (Editor) ; Friedman, J. S. (Editor)

2023
SPIE

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Please use a persistent id in citations: doi:10.1117/12.2678145  doi:10.34734/FZJ-2023-05766

Abstract: 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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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)
2. DFG project 390534769 - EXC 2004: Materie und Licht für Quanteninformation (ML4Q) (390534769) (390534769)

Appears in the scientific report 2023

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