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Studies in the growth of ZnSe on GaAs(001) |
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| Authors: | J. Riley D. Wolfframm D. Westwood A. Evans |
| Affiliation: | a School of Physics, La Trobe University, Bundoora, Victoria 3083, Australia b Department of Physics, North East Wales Institute, Plas Coch, Wrexham, UK c Department of Physics and Astronomy, University of Wales, Cardiff, P.O. Box 913, Cardiff CF2 3YB, UK |
| Abstract: | This paper reports a study of the molecular beam epitaxial (MBE) growth of ZnSe on GaAs substrates using elemental sources. Growth rates of ZnSe as a function of Se:Zn flux ratio for constant Zn flux were determined over a wider range of values than previously reported. Careful measurements of atomic fluxes and sample thickness lead to a determination of the sticking coefficients of Zn and Se which are at variance with many previously reported values. The temperature dependence of the sticking coefficients of Zn and Se has been measured carefully and provides evidence for a greater desorption of Zn from the growing surface than previously thought, an effect which persists at low growth temperatures. Measurements at high flux ratios support the use of a precursor model to describe MBE growth of ZnSe on GaAs substrates. |
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