Fig. 3: Phonon dispersions of α-quartz.
From: A machine-learned interatomic potential for silica and its relation to empirical models

Phonon dispersion curve of α-quartz, along the Γ → M → K → Γ pathway through reciprocal space, as computed using the a GAP, b Broughton, c Munetoh, d Vashishta, e CHIK, and f BKS potentials (red and blue lines, respectively), compared to experimental data by Dorner et al. (taken from ref. 51; black symbols connected by lines to guide the eye).