Formation of multilayer two-dimensional Pb Islands on Si(111)7×7 at low temperature: From nucleation to growth

B. Su, H. Chang, Y. Lin, P. Chiu, S. Chang, Tien Tsong, Y. Lin, P. Chiu, Y. Fu

Research output: Contribution to journalArticle

Abstract

The morphology of Pb islands formed on Si(111)7×7 at low temperature has the characteristics of both three-dimensional (3D) and 2D structures as they are of multilayer thickness but have a flat top surface. We use scanning tunneling microscopy to observe the growth behavior from the incipient stage to the formation of islands. Our observations show that the growth is 3D (Stranski-Krastanov mode) right after the nucleation, but that there is a transition from 3D to 2D when the nucleus reaches a certain size. This transition is driven by the quantum size effect, and it changes the growth behavior of Pb islands to be similar to that of single-layer islands in homoepitaxy systems. This similarity allows us to apply the scaling theory to analyze the size distribution of Pb islands, and also to conclude the critical size to be three atoms at the nucleation stage.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number11
DOIs
Publication statusPublished - 2003 Jul 15

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Multilayers
Nucleation
nucleation
Scanning tunneling microscopy
Temperature
Atoms
scanning tunneling microscopy
flat surfaces
scaling
nuclei
atoms

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Formation of multilayer two-dimensional Pb Islands on Si(111)7×7 at low temperature : From nucleation to growth. / Su, B.; Chang, H.; Lin, Y.; Chiu, P.; Chang, S.; Tsong, Tien; Lin, Y.; Chiu, P.; Fu, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 11, 15.07.2003.

Research output: Contribution to journalArticle

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