SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 110: Poster Session VIII: Poster to Mini-Symposium: Dzyaloshinskii-Moriya Interaction (DMI) in magnetic layered systems
O 110.1: Poster
Donnerstag, 4. März 2021, 13:30–15:30, P
Magnetic exchange interactions at proximity of a superconductor — •Uriel Allan Aceves Rodriguez1, Sascha Brinker1, Filipe Souza Mendes Guimaraes2, and Samir Lounis1,3 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany — 2Jülich Supercomputing Centre, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany — 3Faculty of Physics, University of Duisburg-Essen, 47053 Duisburg, Germany
Magnetic impurities coupled to superconductors give rise to a plethora of rich physics such as sub-gap states like Yu-Shiba-Rusinov states and Majorana zero modes, which constitute key mechanisms on the road towards a topological quantum computer. The interplay of spin-orbit coupling and (non-collinear) magnetism enrich the complexity and topological nature of the in-gap states hosted in proximity-induced superconductors. However, little is known about the impact of superconductivity on the different contributions to the magnetic exchange interactions, like the bilinear isotropic exchange and the Dzyaloshinskii-Moriya interaction — and in turn the impact on the magnetic textures. In this work, we propose a method for the extraction of the tensor of exchange interactions in the superconducting regime as described in the framework of the Bogoliubov-de Gennes method. We investigate various 3d monolayers deposited on the Nb(110) surface based on our multi-orbital tight-binding code TITAN.
–Work funded by Horizon 2020–ERC (CoG 681405–DYNASORE).