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Quantum Theory of Materials seminar, PGI-1/IAS-1

Dr. Jan Müller

Magnetic skyrmions and topological domain walls

begin
26 Sep 2018 11:30
venue
N-142

Universität zu Köln

Abstract:

Magnetic skyrmions are whirls in the magnetization with an integer topological winding number. They are stabilized by exchange and Dzyaloshinskii-Moriya interaction at scales down to the nanometer regime and turn out to be highly stable and mobile. Due to these properties, they are often discussed as possible candidates for future memory devices. From a physics perspective they are particularly interesting since new properties emerge from the interplay of both energetic and topological contributions.

In my talk I will present an overview of our latest contributions to this field, covering topological half-skyrmion defects that emerge at the interface between domains of helical phases with different orientations, skyrmions in the helical phase as an interesting counterpart to usually studied polarized backgrounds, the lifetime of skyrmions from experimental observations, and the recently measured structural transformation of skyrmions close to the surface of the crystal.

Contact

Dr. Jonathan Chico
Phone: +49 2461 61-1719
email: j.chico@fz-juelich.de

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