Relationship between the lateral length and thickness of the platelets in naturally occurring strained layer superlattice structures

Ian T. Ferguson, Andrew G. Norman, Tae Yeon Seong

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The molecular beam epitaxial growth of InAs0.5Sb0.5 onto (001) surfaces below 430°C results in the formation of a "natural" strained layer superlattice (n-SLS). Transmission electron micrographs of 〈110〉 cross sections showed the existence of two different alloy compositions that formed a tetragonally distorted interleaved platelet structure in which the interfaces were highly regular and ran approximately parallel to the growing surface. It is found that the structure of the n-SLS can be changed systematically by carefully controlling the InAs0.5Sb0.5 growth conditions. A simple relationship is derived relating the lateral size of the platelet to its thickness that is found to hold experimentally for n-SLS structures. It is suggested that the n-SLS structure occurs because it corresponds to the minimum free energy configuration of the growing crystal. A similar formalization has been applied to periodic modulations in other material systems.

Original languageEnglish
Pages (from-to)5733-5736
Number of pages4
JournalJournal of Applied Physics
Volume88
Issue number10
Publication statusPublished - 2000 Nov 15
Externally publishedYes

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platelets
molecular beams
free energy
modulation
cross sections
configurations
crystals
electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Relationship between the lateral length and thickness of the platelets in naturally occurring strained layer superlattice structures. / Ferguson, Ian T.; Norman, Andrew G.; Seong, Tae Yeon.

In: Journal of Applied Physics, Vol. 88, No. 10, 15.11.2000, p. 5733-5736.

Research output: Contribution to journalArticle

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