Physical properties of InGaAs quantum dots in AlGaAs nanowires synthesized on silicon at different growth temperatures

Condensed matter physics
Authors:
Abstract:

In this work, we have studied the physical properties of InGaAs quantum dots (QDs) in AlGaAs nanowires (NWs) synthesized on silicon at different temperatures. The results of the studies have shown that, a decrease in the growth temperature leads to an increase in the mole fraction of indium in the InGaAs QD solid solution. In this case, the number of defects in QDs increases significantly due to an increase in the mismatch in the crystal lattices parameters of NWs and QDs.

Funding:

The samples were grown under financial support of the Ministry of Science and Higher Education of the Russian Federation, research project no. 2019-1442. The morphology of grown samples was studied under financial support of the Russian Science Foundation Grant № 21-72-00099. The study of grown samples optical properties was implemented in the framework of the Basic Research Program at the National Research University Higher School of  Economics (HSE University). The structural properties of grown samples were carried out using equipment of St. Petersburg State University Interdisciplinary Resource Centre for Nanotechnology and St. Petersburg State University Resource Centre “Centre for Optical and Laser Materials Research” with the support of the grant from St. Petersburg University № 92591131.

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