Strongly coupled magnon-phonon dynamics in a single nanomagnet.

Abstract:

:Polaritons are widely investigated quasiparticles with fundamental and technological significance due to their unique properties. They have been studied most extensively in semiconductors when photons interact with various elementary excitations. However, other strongly coupled excitations demonstrate similar dynamics. Specifically, when magnon and phonon modes are coupled, a hybridized magnon-phonon quasiparticle can form. Here, we report on the direct observation of coupled magnon-phonon dynamics within a single thin nickel nanomagnet. We develop an analytic description to model the dynamics in two dimensions, enabling us to isolate the parameters influencing the frequency splitting. Furthermore, we demonstrate tuning of the magnon-phonon interaction into the strong coupling regime via the orientation of the applied magnetic field.

journal_name

Nat Commun

journal_title

Nature communications

authors

Berk C,Jaris M,Yang W,Dhuey S,Cabrini S,Schmidt H

doi

10.1038/s41467-019-10545-x

subject

Has Abstract

pub_date

2019-06-14 00:00:00

pages

2652

issue

1

issn

2041-1723

pii

10.1038/s41467-019-10545-x

journal_volume

10

pub_type

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