Direct Observation of Magnon-Phonon Strong Coupling in Two-Dimensional Antiferromagnet at High Magnetic Fields

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Direct Observation of Magnon-Phonon Strong Coupling in Two-Dimensional Antiferromagnet at High Magnetic Fields
Title:
Direct Observation of Magnon-Phonon Strong Coupling in Two-Dimensional Antiferromagnet at High Magnetic Fields
Other Titles:
Physical Review Letters
Publication Date:
23 August 2021
Citation:
Liu, S., Granados del Águila, A., Bhowmick, D., Gan, C. K., Thu Ha Do, T., Prosnikov, M. A., … Xiong, Q. (2021). Direct Observation of Magnon-Phonon Strong Coupling in Two-Dimensional Antiferromagnet at High Magnetic Fields. Physical Review Letters, 127(9). doi:10.1103/physrevlett.127.097401
Abstract:
We report the direct observation of strong coupling between magnon and phonon in two dimensional antiferromagnetic semiconductor FePS3, via magneto-Raman spectroscopy at magnetic fields up to 30 Tesla. A Raman-active magnon at 121 1/cm is identified through Zeeman splitting in an applied magnetic field. At a field driven resonance with a nearby phonon mode, a hybridized magnon-phonon quasiparticle is formed due to strong coupling between the two modes. We develop a microscopic model of the strong coupling in the two-dimensional magnetic lattice, which enables us to elucidate the nature of the emergent quasiparticle. Our polarized Raman results directly shows that the magnons transfer their spin angular momentum to the phonons and generate phonon spin through the strong coupling.
License type:
Publisher Copyright
Funding Info:
This research is supported by core funding from: IHPC
Grant Reference no. : NA

This research / project is supported by the Ministry of Education - AcRF Tier 3 Programme “Geometrical Quantum Material”
Grant Reference no. : MOE2018-T3-1-002
Description:
ISSN:
0031-9007
1079-7114
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