Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 47: Focus Session: Spinorbitronics – from efficient charge/spin conversion based on spin-orbit coupling to chiral magnetic skyrmions II (joint session MA/TT)

MA 47.8: Vortrag

Donnerstag, 15. März 2018, 17:15–17:30, H 1012

Engineering Chiral and Topological Orbital Magnetism of Domain Walls and Skyrmions
— •Fabian R. Lux, Frank Freimuth, Stefan Blügel, and Yuriy Mokrousov —
Peter Grünberg Institut and Institute for Advanced Simulation,
Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

In the field of spin-orbitronics, the orbital physics of electrons plays a central role, with the orbital magnetization representing a key concept. While the orbital magnetism in ferromagnets is relatively well understood, very little is known about it for non-collinear structures such as magnetic skyrmions and domain walls. By employing a semiclassical Green’s function formalism, we demonstrate how the orbital magnetization in extended chiral magnetic systems can be understood as the electronic response to emergent electromagnetic fields [1]. We discovered that in such systems the spin-orbit interaction can be used to a great advantage in that it promotes a complex interplay of real-space and k-space topology leading to enhanced orbital responses in interfacial chiral magnets. Besides discussing possible applications of the emergent orbital magnetism in chiral spin systems we also suggest new perspectives for the field of chiral orbitronics.

[1] F. R. Lux et al., arXiv:1706.06068 (2017)