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  Local equilibrium and global relaxation of strained SiGe/Si(001) layers

Stoffel, M., Rastelli, A., Tersoff, J., Merdzhanova, T., & Schmidt, O. G. (2006). Local equilibrium and global relaxation of strained SiGe/Si(001) layers. Physical Review B, 74(15): 155326.

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 Creators:
Stoffel, M.1, Author           
Rastelli, A.1, 2, Author           
Tersoff, J., Author
Merdzhanova, T.2, Author           
Schmidt, O. G.1, 2, 3, 4, Author           
Affiliations:
1Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370481              
2Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370501              
3Scientific Facility Nanostructuring Lab (Jürgen Weis), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370499              
4Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370504              

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 Abstract: We investigate the morphological evolution of islands obtained by
epitaxial growth of Ge on Si(001) substrates. We are able to obtain
highly uniform distributions of SiGe islands, which exhibit a "barn"
shape. In addition to previously observed facets, we identify higher
index facets, which are not observed in dome-shaped islands. The
evolution of the island-related facet area provides evidence of a
transition from domes to steeper barns, which continues the sequence of
coherent island types before the onset of plastic relaxation. For
higher Ge coverages, when plastically relaxed islands (superdomes)
form, the island ensemble loses its homogeneity. This is essentially
the result of anomalous coarsening, with material being transferred
from coherent islands to larger superdomes.

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Language(s): eng - English
 Dates: 2006
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 306178
ISI: 000241723600106
 Degree: -

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Title: Physical Review B
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 74 (15) Sequence Number: 155326 Start / End Page: - Identifier: ISSN: 1098-0121