Effect of Mass Fluctuation on Collective Modes in a Dusty Plasma
  The grains immersed in plasma get eroded by the ions falling onto them. As a consequence, they exhibit self-consistent mass fluctuations due to perturbations in the plasma charging currents. The grain mass is then a dynamical variable. The modifications in the plasma dielectric properties are investigated and new ultra-low frequency modes are shown to exist in the plasma. 
D.Belemdjaldi, R.Bharuthram, R.Annou