Publication Details:

Established in 2008

Journal or Publication Title:

Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես

Date of publication:

2008

Volume:

1

Number:

3

ISSN:

1829-1171

Official URL:

Coverage:

208-218

Abstract:

The Liquid Phase Epitaxy (LPE) technique is used for self-assembled InAsSbP-based strain-induced islands formation on InAs(100) substrates. Here we show that such islands, as they decrease in size, are undergoing a shape transition. As the islands volume decrease, the following succession of shape transitions has been detected: truncated pyramid, {111} facetted pyramid, {111} and partially {105} facetted pyramid, completely unfacetted “pre-pyramid”, which gradually evolve to semiglob. The morphology, size, shape and composition of these objects are investigated by scanning electron microscope (SEM) and Energy Dispersive X-Ray Analysis (EDXA) technique. A critical size (~550 nm) of the InAsSbP-based strain-induced islands shape transformation from “pre-pyramid” to semiglobe is experimentally detected and, in addition, theoretically explained and calculated. Proposed theoretical approach has been also employed and tested for Si1xGex model system islands grown on a Si(001) substrate. It is shown that for both materials the theoretically calculated values of the critical size coincide with the experimentally obtained data.

Table of contents:

Place of publishing:

Digitisation sponsor:

Date created:

2008-12-10

Format:

pdf

Identifier:

oai:arar.sci.am:23200

Location of original object:

ՀՀ ԳԱԱ Հիմնարար գիտական գրադարան