Regensburg 2019 – scientific programme

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MA: Fachverband Magnetismus

MA 54: Magnetic textures: Transport and dynamics III

MA 54.5: Talk

Friday, April 5, 2019, 10:30–10:45, H37

Transport effects in magnetic textures of non-Abelian frustrated antiferromagnets — •Patrick M. Buhl¹, Frank Freimuth¹, Stefan Blügel¹, and Yuriy Mokrousov^1,2 — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — ²Institute of Physics, Johannes Gutenberg-University Mainz, 55128 Mainz, Germany

The topological Hall effect as the main transport signature of skyrmion textures has proven to be a key phenomenon for skyrmion detection and device design utilizing skyrmions. Interpretation of experimental measurements requires theoretical predictions that can be obtained in the adiabatic limit through semiclassical equations of motion in combination with the Boltzmann formalism. A conceptually similar method was employed recently to estimate the non-Abelian topological spin Hall effect of skyrmion lattices in collinear antiferromagnets [1].

Here, we consider an extension of the non-Abelian wave-packet dynamics to magnetic textures made of frustrated antiferromagnets, with particular focus on the impact of local non-collinearity on traversing electrons. Based on model calculations, we investigate the impact of the modified non-Abelian electron dynamics on the transport properties of various frustrated imprinted textures of different topological character, and provide possible material candidates where the novel type of non-Abelian dynamics could be observed. This work is supported by SFB 1238 of the DFG.

[1] P.M. Buhl, et al., PSS RRL 11, 1700007 (2017)