@article{Bossini2021Ultra-54543,
  year={2021},
  doi={10.1103/PhysRevLett.127.077202},
  title={Ultrafast Amplification and Nonlinear Magnetoelastic Coupling of Coherent Magnon Modes in an Antiferromagnet},
  number={7},
  volume={127},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Bossini, Davide and Pancaldi, Matteo and Soumah, Lucile and Basini, Martina and Mertens, Fabian and Cinchetti, Mirko and Satoh, Takuya and Gomonay, Olena and Bonetti, Stefano},
  note={Article Number: 077202}
}

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    <dc:contributor>Pancaldi, Matteo</dc:contributor>
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    <dc:contributor>Gomonay, Olena</dc:contributor>
    <dc:contributor>Bonetti, Stefano</dc:contributor>
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    <dc:creator>Satoh, Takuya</dc:creator>
    <dc:contributor>Bossini, Davide</dc:contributor>
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    <dc:creator>Bonetti, Stefano</dc:creator>
    <dcterms:title>Ultrafast Amplification and Nonlinear Magnetoelastic Coupling of Coherent Magnon Modes in an Antiferromagnet</dcterms:title>
    <dc:creator>Gomonay, Olena</dc:creator>
    <dc:contributor>Mertens, Fabian</dc:contributor>
    <dc:contributor>Cinchetti, Mirko</dc:contributor>
    <dc:contributor>Soumah, Lucile</dc:contributor>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-08-11T07:54:57Z</dcterms:available>
    <dc:contributor>Satoh, Takuya</dc:contributor>
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    <dc:creator>Basini, Martina</dc:creator>
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    <dcterms:abstract xml:lang="eng">We investigate the role of domain walls in the ultrafast magnon dynamics of an antiferromagnetic NiO single crystal in a pump-probe experiment with variable pump photon energy. Analyzing the amplitude of the energy-dependent photoinduced ultrafast spin dynamics, we detect a yet unreported coupling between the material’s characteristic terahertz- and gigahertz-magnon modes. We explain this unexpected coupling between two orthogonal eigenstates of the corresponding Hamiltonian by modeling the magnetoelastic interaction between spins in different domains. We find that such interaction, in the nonlinear regime, couples the two different magnon modes via the domain walls and it can be optically exploited via the exciton-magnon resonance.</dcterms:abstract>
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    <dc:creator>Mertens, Fabian</dc:creator>
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    <dc:creator>Soumah, Lucile</dc:creator>
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