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Title: 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.

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [2];  [1]
  1. Univ. of California, Santa Cruz, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1596676
Grant/Contract Number:  
[AC02-05CH11231; ECCS-1509020; DMR-1506104]
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
[ Journal Volume: 10; Journal Issue: 1]; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Berk, Cassidy, Jaris, Mike, Yang, Weigang, Dhuey, Scott, Cabrini, Stefano, and Schmidt, Holger. Strongly coupled magnon–phonon dynamics in a single nanomagnet. United States: N. p., 2019. Web. doi:10.1038/s41467-019-10545-x.
Berk, Cassidy, Jaris, Mike, Yang, Weigang, Dhuey, Scott, Cabrini, Stefano, & Schmidt, Holger. Strongly coupled magnon–phonon dynamics in a single nanomagnet. United States. doi:10.1038/s41467-019-10545-x.
Berk, Cassidy, Jaris, Mike, Yang, Weigang, Dhuey, Scott, Cabrini, Stefano, and Schmidt, Holger. Fri . "Strongly coupled magnon–phonon dynamics in a single nanomagnet". United States. doi:10.1038/s41467-019-10545-x. https://www.osti.gov/servlets/purl/1596676.
@article{osti_1596676,
title = {Strongly coupled magnon–phonon dynamics in a single nanomagnet},
author = {Berk, Cassidy and Jaris, Mike and Yang, Weigang and Dhuey, Scott and Cabrini, Stefano and Schmidt, Holger},
abstractNote = {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.},
doi = {10.1038/s41467-019-10545-x},
journal = {Nature Communications},
number = [1],
volume = [10],
place = {United States},
year = {2019},
month = {6}
}

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