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Title: Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields
Authors: Liu, Sheng
Del Águila, Andrés Granados
Bhowmick, Dhiman
Gan, Chee Kwan
Thu Ha Do, T.
Prosnikov, M. A.
Sedmidubský, David
Sofer, Zdenek
Christianen, Peter C. M.
Sengupta, Pinaki
Xiong, Qihua
Keywords: Science::Physics
Issue Date: 2021
Source: Liu, S., Del Águila, A. G., Bhowmick, D., Gan, C. K., Thu Ha Do, T., Prosnikov, M. A., Sedmidubský, D., Sofer, Z., Christianen, P. C. M., Sengupta, P. & Xiong, Q. (2021). Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields. Physical Review Letters, 127(9), 097401-.
Project: MOE2018-T3-1-002
Journal: Physical Review Letters
Abstract: We report the direct observation of strong coupling between magnons and phonons in a two-dimensional antiferromagnetic semiconductor FePS_{3}, via magneto-Raman spectroscopy at magnetic fields up to 30 Tesla. A Raman-active magnon at 121  cm^{-1} 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 show that the magnons transfer their spin angular momentum to the phonons and generate phonon spin through the strong coupling.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.127.097401
Rights: © 2021 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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