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Unidirectional Pumping of Phonons by Magnetization Dynamics

MPG-Autoren
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Yu,  T.
Kavli Institute of NanoScience, Delft University of Technology;
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

Externe Ressourcen

https://dx.doi.org/10.1103/PhysRevLett.125.077203
(Verlagsversion)

Volltexte (beschränkter Zugriff)
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Volltexte (frei zugänglich)

PhysRevLett.125.077203.pdf
(Verlagsversion), 640KB

Ergänzendes Material (frei zugänglich)

Supplemental_Material.pdf
(Ergänzendes Material), 2MB

Zitation

Zhang, X., Bauer, G. E., & Yu, T. (2020). Unidirectional Pumping of Phonons by Magnetization Dynamics. Physical Review Letters, 125(7): 077203. doi:10.1103/PhysRevLett.125.077203.


Zitierlink: https://hdl.handle.net/21.11116/0000-0006-ED1A-3
Zusammenfassung
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.