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- W3208580276 abstract "A coherent THz optical lattice mode is triggered by femtosecond laser pulsesin the antiferromagnetic van der Waals semiconductor FePS$_3$. The 380 nm thickexfoliated flake was placed on a substrate and laser-driven lattice and spindynamics were investigated as a function of the excitation photon energy andsample temperature. The pump-probe spectroscopic measurements reveal that thephoto-induced phonon is generated by a displacive mechanism. The amplitude ofthe phononic signal decreases as the sample is heated up to the N'eeltemperature and vanishes as the phase transition to the paramagnetic phaseoccurs. This evidence confirms that the excited lattice mode is intimatelyconnected to the long-range magnetic order. Therefore our work discloses apathway towards a femtosecond coherent manipulation of the magneto-crystallineanisotropy in a van der Waals antiferromagnet. In fact, it is reported that byapplying a magnetic field the induced phonon mode hybridizes via theKittel-mechanism with zone-centre magnons." @default.
- W3208580276 created "2021-11-08" @default.
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- W3208580276 date "2021-11-02" @default.
- W3208580276 modified "2023-09-26" @default.
- W3208580276 title "Ultrafast coherent THz lattice dynamics coupled to spins in a van der Waals antiferromagnetic flake." @default.
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