Cavity-magnon-polariton spectroscopy of strongly hybridized electro-nuclear spin excitations in LiHoF4

We first present a formalism that incorporates the input-output formalism and the linear response theory to employ cavity-magnon-polariton coupling as a spectroscopic tool for investigating strongly hybridized electro-nuclear spin excitations. A microscopic relation between the generalized susceptib...

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Veröffentlicht in:Scientific reports 2024-10, Vol.14 (1), p.25227-14, Article 25227
Hauptverfasser: Yang, Yikai, Babkevich, Peter, Gaal, Richard, Živković, Ivica, Rønnow, Henrik M.
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Sprache:eng
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Zusammenfassung:We first present a formalism that incorporates the input-output formalism and the linear response theory to employ cavity-magnon-polariton coupling as a spectroscopic tool for investigating strongly hybridized electro-nuclear spin excitations. A microscopic relation between the generalized susceptibility and the scattering parameter | S 11 | in strongly hybridized cavity-magnon-polariton systems has been derived without resorting to semi-classical approximations. The formalism is then applied to both analyze and simulate a specific systems comprising a model quantum Ising magnet ( LiHoF 4 ) and a high-finesse 3D re-entrant cavity resonator. Quantitative information on the electro-nuclear spin states in LiHoF 4 is extracted, and the experimental observations across a broad parameter range were numerically reproduced, including an external magnetic field traversing a quantum critical point. The method potentially opens a new avenue not only for further studies on the quantum phase transition in LiHoF 4 but also for a wide range of complex magnetic systems.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-75978-x