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- W4312003003 abstract "Photoexcitation of a Mott insulator on a square lattice has weakened the intensity of both single- and two-magnon as observed in time-resolved resonant-inelastic x-ray scattering and time-resolved Raman scattering. However, the spectral change in low-energy regions below the magnons has not been clarified so far. To uncover the nature of photoinduced low-energy magnetic excitations of the Mott insulator, we numerically investigate transient magnetic dynamics in a photoexcited half-filled Hubbard model on the square lattice. After turning off a pump pulse tuned for an absorption edge, new magnetic signals clearly emerge well below magnon energy in both single- and two-magnon excitations. We find that the low-energy excitations are predominantly created via excitonic states at the absorption edge. These exciton-assisted magnetic excitations may provide a possible explanation for low-energy spectral weight in a recent time-resolved two-magnon Raman scattering experiment for insulating YBa$_2$Cu$_3$O$_{6.1}$." @default.
- W4312003003 created "2023-01-03" @default.
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- W4312003003 date "2022-07-07" @default.
- W4312003003 modified "2023-10-14" @default.
- W4312003003 title "Exciton-assisted low-energy magnetic excitations in a photoexcited Mott insulator on the square lattice" @default.
- W4312003003 doi "https://doi.org/10.48550/arxiv.2207.03141" @default.
- W4312003003 hasPublicationYear "2022" @default.
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