Role of strain-dependent surface energies in Ge/Si(100) island formation

O. E. Shklyaev*, M. J. Beck, M. Asta, Michael J Miksis, Peter W Voorhees

*Corresponding author for this work

Research output: Contribution to journalArticle

77 Scopus citations

Abstract

Formation energies for Ge/Si(100) pyramidal islands are computed combining continuum calculations of strain energy with first-principles-computed strain-dependent surface energies. The strain dependence of surface energy is critically impacted by the presence of strain-induced changes in the Ge {100} surface reconstruction. The appreciable strain dependencies of rebonded-step {105} and dimer-vacancy-line-reconstructed {100} surface energies are estimated to give rise to a significant reduction in the surface contribution to island formation energies.

Original languageEnglish (US)
Article number176102
JournalPhysical Review Letters
Volume94
Issue number17
DOIs
StatePublished - May 6 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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