instability growth rate due to high pressure effective lattice viscosity are presented. Using a
laser created ramped drive, vanadium samples are compressed and accelerated quasi-
isentropically at∼ 1 Mbar peak pressures, while maintaining the sample in the solid state.
Comparisons with simulations and theory indicate that the high pressure, high strain rate
conditions trigger a phonon drag mechanism, resulting in the observed high effective lattice …