Unidirectional Pumping of Phonons by Magnetization Dynamics

Journal article (2020)

Authors

Xiang Zhang QN/Blaauboer Group - AS , Kavli institute of nanoscience Delft
G.E. Bauer Kavli institute of nanoscience Delft, Tohoku University, QN/Bauer Group - AS
T. Yu Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Kavli institute of nanoscience Delft, QN/Bauer Group - AS
Research Group
QN/Blaauboer Group (AS) (TU Delft)
Copyright: © 2020 Xiang Zhang, G.E. Bauer, T. Yu
DOI: https://doi.org/10.1103/PhysRevLett.125.077203
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Published Date

2020

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Blaauboer Group

Abstract

We propose a method to control surface phonon transport by weak magnetic fields based on the pumping of surface acoustic waves (SAWs) by magnetostriction. We predict that the magnetization dynamics of a nanowire on top of a dielectric films injects SAWs with opposite angular momenta into opposite directions. Two parallel nanowires form a phononic cavity that at magnetic resonances pump a unidirectional SAW current into half of the substrate.