Nucleation-related defect-free GaP/Si(100) heteroepitaxy via metal-organic chemical vapor deposition

  • Grassman T
  • Carlin J
  • Galiana B
 et al. 
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GaP/Si heterostructures were grown by metal-organic chemical vapor deposition in which the formation of all heterovalent nucleation-related defects (antiphase domains, stacking faults, and microtwins) were fully and simultaneously suppressed, as observed via transmission electron microscopy (TEM). This was achieved through a combination of intentional Si(100) substrate misorientation, Si homoepitaxy prior to GaP growth, and GaP nucleation by Ga-initiated atomic layer epitaxy. Unintentional (311) Si surface faceting due to biatomic step-bunching during Si homoepitaxy was observed by atomic force microscopy and TEM and was found to also yield defect-free GaP/Si interfaces.

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  • T. J. Grassman

  • J. A. Carlin

  • B. Galiana

  • L. M. Yang

  • F. Yang

  • M. J. Mills

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