Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 34: Magnetic textures: Transport and dynamics II

MA 34.11: Vortrag

Mittwoch, 3. April 2019, 18:00–18:15, H37

Deformations of magnetic skyrmions — •Davi Rohe Rodrigues¹, Artem Abanov², and Karin Everschor-Sitte¹ — ¹Institute of Physics, Johannes Gutenberg-University, 55128 Mainz, Germany — ²Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843-4242, USA

Dynamical deformations of skyrmions have several implications on their transport properties, like a modified skyrmion Hall angle and a maximum skyrmion velocity.[1,2,3] Furthermore, the gigahertz dynamics of skyrmion excitation modes might be exploited for non-conventional computation.[4] In this work, we derive a general framework to describe the dynamics of deformations in isolated magnetic skyrmions. This effective profile ansatz- and microscopic detail-independent theory can be applied to current and field driven dynamics of skyrmions.[5] We analyse the change in the skyrmion Hall angle due to deformation of skyrmions and derive a current-induced bimeron instability. This powerful formalism provides an efficient tool to understand the experimentally observed low-energy skyrmion dynamics as well as suggests new applications of magnetic skyrmions.

[1]Litzius et al., to be published; [2] Leliaert et al., Jour. Phys. D 52 024003 (2019); [3]Tomasello et al., arXiv:1808.01476; [4] Bourianoff et al., AIP Advances 8 (2018); [5] Rodrigues et al., Phys. Rev. B 97 134414 (2018).