Ion Induced Formation of Regular Nanostructures on Amorphous GaSb Surfaces

Crystalline and amorphous GaSb surfaces are compared concerning their response
to sputter erosion with low-energy Ar$^+$-ions under normal incidence. We show
that the formation of regular nanostructures on GaSb is basically independent
on whether the initial material is crystalline or amorphous. The similarity in
the temporal and spatial evolution demonstrates that the dynamics of the
morphology evolution is entirely controlled by a thin amorphous
nonstoichiometric surface layer.