Fig. 5: Phonon frequency combs in CrSiTe3, with parallel geometry (VV).
From: Spontaneously formed phonon frequency combs in van der Waals solid CrGeTe3 and CrSiTe3
a Raman spectrum of the \({A}_{{{{\rm{g}}}}}^{5}\) mode in CrSiTe3. The black solid line is a fit with the Fourier transform of Eq. (6). b Temperature dependence of the \({A}_{{{{\rm{g}}}}}^{5}\) mode. c Simulation of the atomic movement for both theoretical and observed phonon frequency combs.
