Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 59: Posters Magnetism III

MA 59.19: Poster

Friday, March 20, 2020, 09:00–12:00, P2/EG

Edges modes in FM-SC hybrid structures — •Jasmin Bedow^1,2, Eric Mascot², Stephan Rachel³, Dirk Morr², and Götz Uhrig¹ — ¹TU Dortmund — ²University of Illinois at Chicago, Chicago, USA — ³University of Melbourne

We investigated edge modes in two-dimensional FM-SC hybrid structures, composed of an s-wave superconductor and magnetically ordered adatoms placed on top of the superconducting substrate.

Our results show topological properties for a 3Q-ordered structure of the adatoms' spins. For this ordering, we computed the topological phase diagram and the zero-energy local density of states for islands and ribbons of adatoms. For these, Majorana modes emerge depending on the chosen parameter set and a supercurrent is found along the edge of the magnetic structure.

Furthermore, we investigated different types of magnetic domains, including domains created by shifts in the unit cell, a reversal of the spins' orientation and a reversal of the superconducting order parameter. The emerging edge modes show interesting dispersions and we determined whether they are Majorana modes.