Pump-probe reflectivity on bulk WSe2 reveals coherent phonon oscillations at 7.45, 7.49 and 7.7 THz that are reproduced by superposing three waves with different phases, plus weaker signals at 4.0 and 11.5 THz.
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Phonon dynamics of a bulk WSe$_2$ crystal excited by ultrashort near-infrared pulses
Pump-probe reflectivity on bulk WSe2 reveals coherent phonon oscillations at 7.45, 7.49 and 7.7 THz that are reproduced by superposing three waves with different phases, plus weaker signals at 4.0 and 11.5 THz.