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MA: Fachverband Magnetismus
MA 30: Surface Magnetism
MA 30.7: Vortrag
Donnerstag, 8. September 2022, 11:00–11:15, H48
The mutual impact of magnetism on proximity-induced superconductivity — •Uriel Aceves1,2, Filipe Guimaraes3, and Samir Lounis1,2 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany — 2Faculty of Physics & CENIDE, University of Duisburg-Essen, 47053 Duisburg, Germany — 3Jülich Supercomputing Centre, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany
In a conventional superconductor (SC), vibrations on the crystal lattice can cause electrons to attract mutually and bind in the so-called Cooper pairs. At the interface of a normal metal (NM), Cooper pairs can wander from SC to NM resulting in a proximity induced gap. Electrons from NM can also travel into SC by normal transport or Andreev reflection. This exchange of electrons can impact the properties of both materials. Moreover, if the NM is magnetic new and exciting physics appears. In this work, we explore NM/SC interface phenomena by introducing a method to extract the tensor of magnetic exchange interactions within the framework of the Bogoliubov-de Gennes equations where superconductivity is induced via an effective electron-phonon coupling constant λ and accounting for spin-orbit coupling. Based on a realistic description of the electronic structure, we analyze the behaviour of the isotropic exchange and the Dzyaloshinskii-Moriya interaction as a function of λ on a Mn monolayer on top of a superconducting Nb (110) slab. Additionally, we investigate the impact of λ on the proximity-induced gap as a function of the direction of the magnetic moment in Mn.