Impulsive Fermi magnon-phonon resonance in antiferromagnetic $CoF_{2}$
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| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| author | Metzger, Thomas W. J. Grishunin, Kirill A. Reinhoffer, Chris Dubrovin, Roman M. Arshad, Atiqa Ilyakov, Igor de Oliveira, Thales V. A. G. Ponomaryov, Alexey Deinert, Jan-Christoph Kovalev, Sergey Pisarev, Roman V. Katsnelson, Mikhail I. Ivanov, Boris A. van Loosdrecht, Paul H. M. Kimel, Alexey V. Mashkovich, Evgeny A. |
| author_facet | Metzger, Thomas W. J. Grishunin, Kirill A. Reinhoffer, Chris Dubrovin, Roman M. Arshad, Atiqa Ilyakov, Igor de Oliveira, Thales V. A. G. Ponomaryov, Alexey Deinert, Jan-Christoph Kovalev, Sergey Pisarev, Roman V. Katsnelson, Mikhail I. Ivanov, Boris A. van Loosdrecht, Paul H. M. Kimel, Alexey V. Mashkovich, Evgeny A. |
| contents | Understanding spin-lattice interactions in antiferromagnets is one of the most fundamental issues at the core of the recently emerging and booming fields of antiferromagnetic spintronics and magnonics. Recently, coherent nonlinear spin-lattice coupling was discovered in an antiferromagnet which opened the possibility to control the nonlinear coupling strength and thus showing a novel pathway to coherently control magnon-phonon dynamics. Here, utilizing intense narrow band terahertz (THz) pulses and tunable magnetic fields up to 7 T, we experimentally realize the conditions of the Fermi magnon-phonon resonance in antiferromagnetic $CoF_{2}$. These conditions imply that both the spin and the lattice anharmonicities harvest energy transfer between the subsystems, if the magnon eigenfrequency $f_{m}$ is twice lower than the frequency of the phonon $2f_{m}=f_{ph}$. Performing THz pump-infrared probe spectroscopy in conjunction with simulations, we explore the coupled magnon-phonon dynamics in the vicinity of the Fermi-resonance and reveal the corresponding fingerprints of an impulsive THz-induced response. This study focuses on the role of nonlinearity in spin-lattice interactions, providing insights into the control of coherent magnon-phonon energy exchange. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_01052 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Impulsive Fermi magnon-phonon resonance in antiferromagnetic $CoF_{2}$ Metzger, Thomas W. J. Grishunin, Kirill A. Reinhoffer, Chris Dubrovin, Roman M. Arshad, Atiqa Ilyakov, Igor de Oliveira, Thales V. A. G. Ponomaryov, Alexey Deinert, Jan-Christoph Kovalev, Sergey Pisarev, Roman V. Katsnelson, Mikhail I. Ivanov, Boris A. van Loosdrecht, Paul H. M. Kimel, Alexey V. Mashkovich, Evgeny A. Mesoscale and Nanoscale Physics Understanding spin-lattice interactions in antiferromagnets is one of the most fundamental issues at the core of the recently emerging and booming fields of antiferromagnetic spintronics and magnonics. Recently, coherent nonlinear spin-lattice coupling was discovered in an antiferromagnet which opened the possibility to control the nonlinear coupling strength and thus showing a novel pathway to coherently control magnon-phonon dynamics. Here, utilizing intense narrow band terahertz (THz) pulses and tunable magnetic fields up to 7 T, we experimentally realize the conditions of the Fermi magnon-phonon resonance in antiferromagnetic $CoF_{2}$. These conditions imply that both the spin and the lattice anharmonicities harvest energy transfer between the subsystems, if the magnon eigenfrequency $f_{m}$ is twice lower than the frequency of the phonon $2f_{m}=f_{ph}$. Performing THz pump-infrared probe spectroscopy in conjunction with simulations, we explore the coupled magnon-phonon dynamics in the vicinity of the Fermi-resonance and reveal the corresponding fingerprints of an impulsive THz-induced response. This study focuses on the role of nonlinearity in spin-lattice interactions, providing insights into the control of coherent magnon-phonon energy exchange. |
| title | Impulsive Fermi magnon-phonon resonance in antiferromagnetic $CoF_{2}$ |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2308.01052 |