Layer Ordering and Faulting in [Formula presented] Ultrashort-Period Superlattices

J. H. Li, S. C. Moss, Y. Zhang, A. Mascarenhas, L. N. Pfeiffer, K. W. West, W. K. Ge, J. Bai

Research output: Contribution to journalArticlepeer-review


We report studies of [Formula presented] ultrashort-period superlattices using synchrotron x-ray scattering. In particular, we demonstrate that interfaces of these superlattices contain features on two different length scales: namely, random atomic mixture and ordered mesoscopic domains. Both features are asymmetric on the two interfaces (AlAs-on-GaAs and GaAs-on-AlAs) for [Formula presented]. Periodic compositional stacking faults, arising from the intrinsic nature of molecular-beam epitaxy, are found in the superlattices. In addition, the effect of growth interruption on the interfacial structure is discussed. The relevant scattering theory is developed to give excellent fits to the data.

Original languageEnglish (US)
JournalPhysical review letters
Issue number10
StatePublished - Sep 5 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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