Investigation of Phonon Band Gap, Heat Capacity and Raman Active Phonons in BaWO4 Crystal.

The article presents a study conducted to examine phonon band gap, heat capacity and raman active phonons in BaWO4 crystal. It states that the phonon density of states (PDOS) and phonon-dispersion relations for BaWO4 crystal is calculated using the lattice dynamical calculations approach. It concludes that the presence of a clearly large phonon band gap in the PDOS which produces a difference in anharmonic effects for high and low frequency modes.