Strongly coupled magnon–phonon dynamics in a single nanomagnet

Berk, Cassidy; Jaris, Mike; Yang, Weigang; Dhuey, Scott; Cabrini, Stefano; Schmidt, Holger

doi:10.1038/s41467-019-10545-x

Title: Strongly coupled magnon–phonon dynamics in a single nanomagnet

Journal Article · 14 June 2019 · Nature Communications

DOI: https://doi.org/10.1038/s41467-019-10545-x · OSTI ID:1619525

^[1]; Jaris, Mike ^[1]; Yang, Weigang ^[1]; Dhuey, Scott ^[2]; Cabrini, Stefano ^[2]; Schmidt, Holger ^[1]

Univ. of California, Santa Cruz, CA (United States)
Univ. of California, Berkeley, CA (United States)

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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOE

Grant/Contract Number:: AC02-05CH11231; ECCS-1509020; DMR-1506104

OSTI ID:: 1619525

Alternate ID(s):: OSTI ID: 1596676

Journal Information:: Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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First-principles Modeling of Thermal Transport in Materials: Achievements, Opportunities, and Challenges Ma, Tengfei; Chakraborty, Pranay; Guo, Xixi International Journal of Thermophysics, Vol. 41, Issue 1 https://doi.org/10.1007/s10765-019-2583-4	journal	December 2019

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