  We investigate the effect of spatially correlated disorder on the Anderson
transition of phonons in three dimensions using a Greens function based
approach, namely, the typical medium dynamical cluster approximation (TMDCA),
in mass-disordered systems. We numerically demonstrate that correlated disorder
with pairwise correlations mitigates the localization of the vibrational modes.
A correlation driven localization-delocalization transition can emerge in a
three-dimensional disordered system with an increase in the strength of
correlations.
