Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields
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...
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sg-ntu-dr.10356-1536682023-02-28T19:53:14Z Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields 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 School of Physical and Mathematical Sciences Science::Physics Spin-Waves Scattering 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. Ministry of Education (MOE) Nanyang Technological University Published version This work is mainly supported by the Singapore Ministry of Education via AcRF Tier 3 Programme “Geometrical Quantum Material” (MOE2018-T3-1-002). Q. X. acknowledges strong support from the State Key Laboratory of Low-Dimensional Quantum Physics and the start-up grant from Tsinghua University. P. S. acknowledges financial support from the Ministry of Education, Singapore, through Grant No. MOE2019-T2-2-119. A. G. D. A. gratefully acknowledges the financial support from the Presidential Postdoctoral Fellowship program of the Nanyang Technological University Singapore. Z. S. was supported by project LTAUSA19034 from Ministry of Education Youth and Sports (MEYS). 2022-01-07T04:45:03Z 2022-01-07T04:45:03Z 2021 Journal Article 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-. https://dx.doi.org/10.1103/PhysRevLett.127.097401 0031-9007 https://hdl.handle.net/10356/153668 10.1103/PhysRevLett.127.097401 34506201 2-s2.0-85114150030 9 127 097401 en MOE2018-T3-1-002 MOE2019-T2-2-119 Physical Review Letters © 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. application/pdf |
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Science::Physics Spin-Waves Scattering 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 Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields |
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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. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences 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 |
format |
Article |
author |
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 |
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Liu, Sheng |
title |
Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields |
title_short |
Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields |
title_full |
Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields |
title_fullStr |
Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields |
title_full_unstemmed |
Direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields |
title_sort |
direct observation of magnon-phonon strong coupling in two-dimensional antiferromagnet at high magnetic fields |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/153668 |
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1759854221734182912 |