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Volumn 71, Issue 9, 1993, Pages 1411-1414

Oscillation of the lattice relaxation in layer-by-layer epitaxial growth of highly strained materials

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Indexed keywords


EID: 3743112425     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.71.1411     Document Type: Article
Times cited : (127)

References (19)
  • 10
    • 84927895663 scopus 로고    scopus 로고
    • This is not surprising since a fractional monolayer cannot be considered as a continuous elastic medium.
  • 11
    • 84927895662 scopus 로고    scopus 로고
    • It should be noted that we cannot be sure that we measure the actual mean a|| parameter variation. Since the in-plane lattice parameter varies from the center (where it should be equal to that of GaAs) to edges of 2D islands, some asymmetric broadening of the streaks, which may affect the determination of their position, should occur. From sample to sample we observe a difference in a|| for half and complete monolayer coverage ranging from 0.3% to 0.5%. This scattering can reflect the lack of precision we have in determining the actual value of the mean a||. In fact it is more probably associated with the fluctuation of the mean island size. Indeed we have checked that broadening effects are very limited.
  • 14
    • 84927895661 scopus 로고    scopus 로고
    • This seems justified (to a first approximation) at least for the very first monolayers of InGaAs when the growth regime is still 2D or quasi-2D (our model is proposed to explain the lattice relaxation behavior in this regime). In this case the strain energy is homogeneously distributed over the entire substrate surface. However, when highly 3D islands are formed (i.e., beyond 6 ML), substrate deformation can no longer be neglected (see, for example, Refs. [1] and [2]).
  • 17
    • 84927895660 scopus 로고    scopus 로고
    • The As-As mean surface bond energy is taken as half of the dimer bond energy.
  • 18
    • 84927895659 scopus 로고    scopus 로고
    • For the sake of simplicity, we consider that 2D islands are isotropic to evaluate Δ a||/ a||GaAs at the surface from the calculated 1D island a|| mean relaxation.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.