Dresden 2017 – scientific programme

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MA: Fachverband Magnetismus

MA 47: Spin Hall Effects and Skyrmions I

MA 47.6: Talk

Thursday, March 23, 2017, 10:45–11:00, HSZ 04

Topological Spin Hall Effect in Antiferromagnetic Skyrmions — •Patrick M. Buhl, Frank Freimuth, Stefan Blügel, and Yuriy Mokrousov — Peter Grünberg Institut and Institute of Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

We report on our recent methodological developments designed to describe the transport properties of large-scale chiral magnetic structures on the basis of a Boltzmann-like semiclassical formalism. Density-functional theory is used to supply an accurate initial collinear description of our antiferromagnetic example systems such as Fe/Cu/Fe trilayer. On top, skyrmionic long-range chiral magnetic texture is artificially imposed on the level of degenerate, and thus non-abelian, equations of motion, in which the topological non-triviality manifests as the emergent magnetic field. Within this framework, we iteratively find the wave-packet semiclassical trajectories for the states at the Fermi surface in order to estimate the conductivity tensor. Thereby we gain an important insight into the macroscopic transport properties of two-dimensional chiral magnetic structures and can quantify their sizeable topological spin Hall effect. This work is supported by SFB1238.