SKM 2021 – wissenschaftliches Programm

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SYMS: Symposium Novel phases and dynamical properties of magnetic skyrmions

SYMS 1: Novel phases and dynamical properties of magnetic skyrmions

SYMS 1.5: Hauptvortrag

Dienstag, 28. September 2021, 12:15–12:45, Audimax 2

Magnetic Skyrmions as Topological Multi-Media Influencers — •Sebastián A. Díaz — University of Duisburg-Essen, Duisburg, Germany

Magnetic skyrmions are stable, particle-like spin configurations whose real-space topology affords them with fascinating properties. Soon after their experimental observation and motivated by the prospect of using them as information carriers, research focused on mastering their manipulation via their coupling to applied fields, electric currents, and temperature gradients. However, the spectrum of novel phenomena goes beyond these initial milestone discoveries. Recently, magnetic skyrmions have been shown to be fertile substrates for multiple topological media. This talk will focus on two of our latest theoretical proposals: topological magnon insulating phases supported by skyrmion crystals[1] and topological superconductivity induced by antiferromagnetic skyrmion chains[2]. The hallmarks of the former are robust magnonic states localized at the sample boundaries. These states are suitable for applications in magnonics, the harnessing of magnons as information carriers. Exploiting the mobility of antiferromagnetic skyrmions, our proposed topological superconductivity platform could provide the so far elusive smoking gun evidence of the non-Abelian exchange statistics of Majorana bound states localized at the ends of the chain.

[1] S. A. Díaz et al., PRL 122, 187203 (2019); S. A. Díaz et al., PRR 2, 013231 (2020); T. Hirosawa et al., PRL 125, 207204 (2020)

[2] S. A. Díaz et al., arXiv:2102.03423