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TT: Fachverband Tiefe Temperaturen

TT 37: Skyrmions II (joint session MA/TT)

TT 37.8: Vortrag

Mittwoch, 18. März 2020, 11:45–12:00, POT 6

Mixed Topology Ring States in skyrmions of mixed Weyl semimetals — •Matthias Redies^1,2, Fabian Lux^1,2, Patrick Buhl³, Jan-Phillip Hanke¹, Stefan Blügel¹, and Yuriy Mokrousov^1,3 — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — ²Department of Physics, RWTH Aachen University, 52056 Aachen, Germany — ³Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany

Various properties of Weyl semimetals are currently attracting significant attention. Recently, the concept of a magnetic mixed Weyl semimetal (MWS) has been put forward e.g. in 2D ferromagnets [1], and various prospects of these materials have been suggested. In such 2D materials the Weyl points are exhibited in the mixed space of k-vectors and the magnetization direction. We investigate the effect that skyrmionic order has on electronic transport properties of MWSs. Our analysis reveals the emergence of robust ring-like edge states, carrying local orbital moment, which mediate the transition between two different Chern insulator phases appearing in the skyrmion lattice of MWSs. We discuss the properties of such mixed topology ring states and their possible applications.

We acknowledge funding from Deutsche Forschungsgemeinschaft (DFG) through SPP 2137 “Skyrmionics".

[1] Hanke et al., Nature Comm. 8, 1479 (2017), ibid. 10, 3179 (2019)