Journal article

Topological superconductivity induced by a triple-q magnetic structure

Jasmin Bedow, Eric Mascot, Thore Posske, Goetz S Uhrig, Roland Wiesendanger, Stephan Rachel, Dirk K Morr

PHYSICAL REVIEW B | AMER PHYSICAL SOC | Published : 2020

Abstract

We demonstrate that the recently discovered triple-q (3q) magnetic structure, when embedded in a magnet-superconductor hybrid (MSH) system, gives rise to the emergence of topological superconductivity. We investigate the structure of chiral Majorana edge modes at domain walls, and show that they can be distinguished from trivial in-gap modes through the spatial distribution of the induced supercurrents. Finally, we show that topological superconductivity in 3q MSH systems is a robust phenomenon that does not depend on the relative alignment of the magnetic and superconducting layers, or on the presence of electronic degrees of freedom in the magnetic layer.

University of Melbourne Researchers

Grants

Awarded by US Department of Energy, Office of Science, Basic Energy Sciences


Awarded by ERC Advanced Grant ADMIRE


Awarded by ARC


Funding Acknowledgements

The authors would like to thank H. Kim, A. Kubetzka, and K. von Bergmann for stimulating discussions. This work was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-FG02-05ER46225 (E.M., D.K.M.), ERC Advanced Grant ADMIRE (Project No. 786020) (R.W.), the Studienstiftung des deutschen Volkes (J.B.), and through ARC DP200101118 (S.R.).