Lateral composition modulation in InAs/GaSb superlattices.

Authors :: Stokes, D. W.
Forrest, R. L.
Li, J. H.
Moss, S. C.
Nosho, B. Z.
Bennett, B. R.
Whitman, L. J.
Goldenberg, M.
Source :: Journal of Applied Physics; 1/1/2003, Vol. 93 Issue 1, p311, 5p, 1 Black and White Photograph, 1 Diagram, 3 Graphs
Publication Year :: 2003
Abstract: We report the analysis of lateral composition modulation in (InAs)[sub m]/(GaSb)[sub m] superlattices by x-ray diffraction. Vertical and lateral satellite peaks for a 140 period structure were observed. The lateral modulation wavelength, average superlattice composition, and vertical superlattice wavelength were determined. The lateral modulation was observed only along one in-plane direction resulting in quantum wire-like structures along the [1&1macr;0] direction. The unconventional structure of the lateral composition modulation, in which the stacking of the layers leads to a doubling of the vertical superlattice period, is discussed. [ABSTRACT FROM AUTHOR]