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Initial Stages of Growth of ZnSe on Si

  • R. D. Bringans (a1), D. K. Biegelsen (a1), L.-E. Swartz (a1), F. A. Ponce (a1) and J. C. Tramontana (a1)...

Abstract

Zinc selenide films have been grown heteroepitaxially on Si(100) substrates by molecular beam epitaxy. The initial stages of growth are dominated by the reaction of Se and Si atoms to form the compound SiSe2- The compound formation disrupts epitaxy, and several growth methods which avoid this are described and compared. We find that room temperature deposition plus solid phase epitaxy does not lead to significant SiSex formation and yields uniformly thick films which are misoriented with respect to the substrate and contain large regions of twinned ZnSe. The use of an As monolayer on the Si surface before the start of ZnSe growth allows good ZnSe epitaxy without any Si-Se reaction or any misorientation. ZnSe films have also been used as interlayers for GaAs growth on Si. This has allowed us to obtain uniform GaAs films at thicknesses which typically manifest a coalesced island morphology for GaAs grown directly on Si.

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Initial Stages of Growth of ZnSe on Si

  • R. D. Bringans (a1), D. K. Biegelsen (a1), L.-E. Swartz (a1), F. A. Ponce (a1) and J. C. Tramontana (a1)...

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