Fig. 3: Wavenumber and field dependence of magnon-phonon coherent oscillation.
a Frequency spectrum Fk(ω) observed at B = 11.5 mT around the intersection of the magnon and transverse acoustic (TA) phonon dispersion curves. b Comparison between experimentally obtained gap between the upper branch and lower branch of the spectrum at B = 11.5 mT and the theoretical calculation of the gap frequency. Error bars represent standard deviation. c Frequency spectrum Fk(ω) observed at B = 13.0 mT around the intersection of the magnon and TA-phonon dispersion curves. d Comparison between experimentally obtained gap between the upper branch and lower branch of the frequency spectrum at B = 13.0 mT and the theoretical calculation of the gap frequency.
