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- W4225133058 abstract "Two-dimensional (2D) magnetic semiconductors feature both tightly-bound excitons with large oscillator strength and potentially long-lived coherent magnons due to the presence of bandgap and spatial confinement. While magnons and excitons are energetically mismatched by orders of magnitude, their coupling can lead to efficient optical access to spin information. Here we report strong magnon-exciton coupling in the 2D van der Waals (vdW) antiferromagnetic (AFM) semiconductor CrSBr. Coherent magnons launched by above-gap excitation modulate the interlayer hybridization, which leads to dynamic modulation of excitonic energies. Time-resolved exciton sensing reveals magnons that can coherently travel beyond 7 micrometer, with coherence time above 5 ns. We observe this exciton-coupled coherent magnons in both even and odd number of layers, with and without compensated magnetization, down to the bilayer limit. Given the versatility of vdW heterostructures, these coherent 2D magnons may be basis for optically accessible magnonics and quantum interconnects." @default.
- W4225133058 created "2022-05-01" @default.
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- W4225133058 date "2022-09-07" @default.
- W4225133058 modified "2023-10-05" @default.
- W4225133058 title "Exciton-coupled coherent magnons in a 2D semiconductor" @default.
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- W4225133058 doi "https://doi.org/10.1038/s41586-022-05024-1" @default.
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