Generation, electric detection, and orbital-angular momentum tunneling of 
twisted magnons

Chen, Min; Schäffer, Alexander F.; Berakdar, Jamal; Jia, Chenglong

doi:10.1063/5.0005764

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Generation, electric detection, and orbital-angular momentum tunneling of twisted magnons

MPS-Authors

Schäffer, Alexander F.
External Organizations;
International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1063/5.0005764
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Citation

Chen, M., Schäffer, A. F., Berakdar, J., & Jia, C. (2020). Generation, electric detection, and orbital-angular momentum tunneling of twisted magnons. Applied Physics Letters, 116(17): 172403. doi:10.1063/5.0005764.

Cite as: https://hdl.handle.net/21.11116/0000-000A-DC2B-F

Abstract

A scheme for generating twisted magnons that carry orbital angular momentum in ferromagnetic nanodisks is presented. The topological signature of these eigenmode excitations entails particular features in the associated spin pumping currents. The latter is electrically detectable and can be used to identify these magnons. Considering two disks coupled via the dipole interaction, angular momentum tunneling is demonstrated. The predictions are based on a transparent analytical model and are confirmed by full numerical simulations. As the orbital angular momentum of the magnon is robust to damping, the current findings endorse the potential of twisted magnons for two-dimensional planar integrated spin-wave circuits.