M. Lohmeier et al., INTERFACE ROUGHNESS DURING THERMAL AND ION-INDUCED REGROWTH OF AMORPHOUS LAYERS ON SI(001), Applied physics letters, 64(14), 1994, pp. 1803-1805
The roughness of Si(001) amorphous/crystalline interfaces, regrown by
either solid phase epitaxy (SPE) or ion-beam-induced epitaxial crystal
lization (IBIEC), has been studied by measuring the scattered x-ray in
tensity along crystal truncation rods close to Si bulk Bragg peaks. Fo
r both regrowth methods, the interface region is well described by a d
iscrete roughness profile. The root-mean-square roughnesses are compar
able and rather small: 8.0+/-0.6 angstrom and 7.4+/-0.6 angstrom for t
he SPE and the IBIEC regrown sample, respectively. This indicates the
presence of a common smoothing mechanism.