Diffusional narrowing of Ge on Si(100) coherent island quantum dot size distributions

Jeff Drucker, Sergio Chaparro

Research output: Contribution to journalArticle

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Abstract

The normalized width = standard deviation of island radius/mean island radius (σrl〈r〉r) of molecular beam epitaxy grown Ge on Si(100) coherent island quantum dot size distributions is analyzed for various deposition conditions. It is found that this width decreases as substrate temperature increases independent of deposition flux. This result is interpreted in the context of models which suppose that the energy barrier for edge atom detachment decreases with island size. The faster diffusion kinetics at higher growth temperatures allow these detached edge atoms to more rapidly find the smaller islands producing sharper island size distributions.

Original languageEnglish (US)
Pages (from-to)614-616
Number of pages3
JournalApplied Physics Letters
Volume71
Issue number5
DOIs
StatePublished - Aug 4 1997
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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