Conference Presentation (After Call)

FZJ-2024-02156

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Control of the superconducting pairing in the van der Waals superconductor NbSe2 via magnetic intercalation

Hemmati, M. (Corresponding author)FZJ* ; Blügel, S.FZJ* ; Rüssmann, P.FZJ*

2024

Abstract: We investigate the superconducting properties of NbSe2 using first-principles calculations within the Korringa-Kohn-Rostoker Green function method, accompanied by a description of superconductivity via the Bogoliubov-de Gennes formalism [1]. The Coherent Potential Approximation (CPA) is employed to address the effects of magnetic transition-metal impurities on the electronic structure [2]. Adding low concentrations of randomly placed magnetic atoms inside the van der Waals gap of superconducting NbSe2 influences the superconducting order parameter before suppressing the superconductivity at larger impurity concentrations. This allows us to control the superconducting pairing and engineer the triplet order parameter in NbSe2 with varying concentration and chemical composition of magnetic the impurities.— This work was supported by the ML4Q Cluster of Excellence (EXC 2004/1 * 390534769).[1] P. Rüßmann and S. Blügel, Phys. Rev. B 105 (2022) 125143.[2] P. Rüßmann, D. Silva, M. Hemmati et al., Spintronics XVI (2023) 12656.

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Contributing Institute(s):

1. 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 2024

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