Fig. 1: Phonon dispersion and density of states (DOS) of bulk Si in the diamond structure in the absence of photoexcitation.

Black lines refer to a QE linear response calculation on a 12 × 12 × 12 phonon momentum grid. Orange lines refer to the finite displacement phonons computed on a 8 × 8 × 8 supercell (1024 atoms) by using our GAP potential.