Chiral Pumping of Spin Waves

Journal article (2019)

Authors

T. Yu Kavli institute of nanoscience Delft, QN/Bauer Group - AS
Y.M. Blanter QN/Blanter Group - AS , Kavli institute of nanoscience Delft
G.E. Bauer Tohoku University, QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Research Group
QN/Bauer Group (AS) (TU Delft)
Copyright: © 2019 T. Yu, Y.M. Blanter, G.E. Bauer
DOI: https://doi.org/10.1103/PhysRevLett.123.247202
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Published Date

2019

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Bauer Group

Abstract

We report a theory for the coherent and incoherent chiral pumping of spin waves into thin magnetic films through the dipolar coupling with a local magnetic transducer, such as a nanowire. The ferromagnetic resonance of the nanowire is broadened by the injection of unidirectional spin waves that generates a nonequilibrium magnetization in only half of the film. A temperature gradient between the local magnet and film leads to a unidirectional flow of incoherent magnons, i.e., a chiral spin Seebeck effect.