Abstract
A combination of x-ray diffraction and extended x-ray-absorption fine-structure analyses were used to show that an order-disorder structural transition from zinc blende-to-diamond occurs in metastable (GaSb( alloys at a critical composition even though the short-range order remains perfect throughout; i.e., there is no evidence for Ga-Ga or Sb-Sb bonds in either the zinc-blende or the diamond structure. However, the critical composition was found to depend upon the film growth conditions and a model is presented which explains this result on the basis of morphological effects on film growth kinetics.
- Received 3 December 1984
DOI:https://doi.org/10.1103/PhysRevLett.54.905
©1985 American Physical Society