Roughening transition and solid-state diffusion in short-period InP/In[sub 0.53]Ga[sub 0.47]As superlattices

Gerling, M.; Gustafsson, A.; Rich, D. H.; Ritter, D.; Gershoni, D.
March 2001
Applied Physics Letters;3/5/2001, Vol. 78 Issue 10, p1370
Academic Journal
We have examined the structural properties of InP/In[sub 0.53]Ga[sub 0.47]As superlattices grown by metalorganic molecular beam epitaxy by varying the periodicity and the total thickness. We observed a roughening transition, which involves the formation of wavy interfaces, when the period and total thickness of the superlattice exceeded critical values. Interface roughening in the wake of the growth front reveals that solid state diffusion in subsurface layers can be induced by surface stresses associated with surface roughening. © 2001 American Institute of Physics.


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