Signature of a polyamorphic transition in the THz spectrum of vitreous GeO2

Alessandro Cunsolo, Yan Li, Chaminda N. Kodituwakku +10

The THz spectrum of density fluctuations, $S(Q,\omega )$, of vitreous GeO${}_2$ at ambient temperature was measured by inelastic x-ray scattering from ambient pressure up to pressures wel…