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Geometric Features and Numerical Analysis of InAsSbP Composition Micro- and Nanostructures Shape Transformation at Nucleation from Liquid Phase

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Abstract

Results of the characterization and numerical analysis of InAsSbP composition strain-induced micro- and nanostructures shape transition are presented. Nucleation is performed from In-As-Sb-P quaternary composition liquid phase in Stranski–Krastanow growth mode. Geometric features and the shape transformation chronology of truncated pyramidal islands, lens-shape and pyramidal quantum dots (QDs) are under consideration, which opens up new possibilities at nanoscale engineering and nanoarchitecture of several types of nanostructures. High-resolution scanning electron (HR-SEM) and transmission electron (TEM) microscopes are used for micro- and nanostructures characterization. We show that as the islands volume decreases, the following succession of shape transitions are detected: truncated pyramid, {111} facetted pyramid, {111} and partially {105} facetted pyramid, completely unfacetted ‘pre-pyramid’, which gradually evolve to hemisphere and then again to pyramidal QD but with higher facet indexes. Critical sizes of islands shape transformation from ‘pre-pyramid’ to hemisphere (500–550 nm) and then from lens-shape again to pyramidal QDs (5–7 nm) are experimentally detected and theoretically evaluated. It is shown that theoretically calculated values coincide with experimentally obtained data.

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ACKNOWLEDGMENTS

The authors wish to thank to Dr. T. Boeck from Institute for Crystal Growth (IKZ), Berlin, Germany and Dr. A. Trampert from Paul Drude Institute for Solid State Electronics (PDI), Berlin, Germany for HR-SEM and TEM measurements, respectively.

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Authors and Affiliations

  1. Yerevan State University, Yerevan, Armenia

    K. M. Gambaryan & V. M. Aroutiounian

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  1. K. M. Gambaryan
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  2. V. M. Aroutiounian
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Correspondence to K. M. Gambaryan.

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Translated by K.M. Gambaryan

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Gambaryan, K.M., Aroutiounian, V.M. Geometric Features and Numerical Analysis of InAsSbP Composition Micro- and Nanostructures Shape Transformation at Nucleation from Liquid Phase. J. Contemp. Phys. 56, 133–138 (2021). https://doi.org/10.3103/S1068337221020067

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  • DOI: https://doi.org/10.3103/S1068337221020067

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