The history and current status of surface diffusion were reviewed. It was noted that, from the fundamental point of view, interest in surface diffusion and difficulties in its understanding, stemmed mainly from the collective (many-body) nature of the phenomenon.
Fidgety Particles on Surfaces - How do they Jump, Walk, Group, and Settle in Virgin Areas? A.G.Naumovets, Z.Zhang: Surface Science, 2002, 500[1-3], 414-36