Unidirectional Pumping of Phonons by Magnetization Dynamics

Xiang Zhang, Gerrit E.W. Bauer, Tao Yu

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)
27 Downloads (Pure)


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.

Original languageEnglish
Article number077203
Number of pages6
JournalPhysical Review Letters
Issue number7
Publication statusPublished - 2020


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