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TT: Fachverband Tiefe Temperaturen
TT 37: Skyrmions II (joint session MA/TT)
TT 37.7: Vortrag
Mittwoch, 18. März 2020, 11:30–11:45, POT 6
Topological Phase Transition Controls Magnon Spin Currents — •Sebastián A. Díaz1, Tomoki Hirosawa2, Jelena Klinovaja1, and Daniel Loss1 — 1Department of Physics, University of Basel, Basel, Switzerland — 2Department of Physics, University of Tokyo, Tokyo, Japan
Using magnons in insulating magnets as information carriers is a highly promising approach for low-power consumption devices free of Joule heating. Here we show that a ferromagnetic skyrmion crystal provides a novel platform for switchable magnon currents. Taking advantage of a topological phase transition in the magnon spectrum, we show that an external magnetic field allows one to turn on and off chiral magnon currents carried by topological edge states. We identify concrete systems for experimental implementations. Our proposal establishes a profound connection between the fields of magnetic skyrmions and topological magnonics controlled by magnetic fields.
[1] S. A. Díaz, T. Hirosawa, J. Klinovaja, and D. Loss, arXiv:1910.05214.