Journal
PHYSICAL REVIEW B
Volume 104, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.104.L100415
Keywords
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Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via the excellence cluster MCQST under Germany's Excellence Strategy [EXC-2111, 390814868]
- DFG [WE 5386/4-1, WE 5386/5-1, SPP2137, TRR80, 107745057, 403191981, PF393/19]
- European Research Council (ERC) [291079, 788031]
- Hans Fischer fellowship of the Technische Universitat Munchen-Institute for Advanced Study - German Excellence Initiative
- European Union Seventh Framework Programme [291763]
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The experiment focused on the tunability of cooperativity in coupled spin-cavity systems by changing the magnetic state of the spin system using an external control parameter. The model system used was Cu2OSeO3 material coupled to a microwave cavity resonator, showing a strong tunability of the normalized coupling rate by magnetic field. The results allow for changing the magnon-photon cooperativity from 1 to 60 at the phase boundaries of the skyrmion lattice state.
We experimentally study the tunability of the cooperativity in coupled spin-cavity systems by changing the magnetic state of the spin system via an external control parameter. As a model system, we use the skyrmion host material Cu2OSeO3 coupled to a microwave cavity resonator. We measure a dispersive coupling between the resonator and magnon modes in different magnetic phases of the material and model our results by using the input-output formalism. Our results show a strong tunability of the normalized coupling rate by magnetic field, allowing us to change the magnon-photon cooperativity from 1 to 60 at the phase boundaries of the skyrmion lattice state.
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