Nucleation of Ga droplets self-assembly on GaAs(111)A substrates

We investigated the nucleation of Ga droplets on singular GaAs(111)A substrates in the view of their use as the seeds for the self-assembled droplet epitaxial quantum dots. A small critical cluster size of 1–2 atoms characterizes the droplet nucleation. Low values of the Hopkins-Skellam index (as lo...

Descripción completa

Detalles Bibliográficos
Autores principales: Tuktamyshev, Artur, Fedorov, Alexey, Bietti, Sergio, Vichi, Stefano, Tambone, Riccardo, Tsukamoto, Shiro, Sanguinetti, Stefano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7994575/
https://www.ncbi.nlm.nih.gov/pubmed/33767304
http://dx.doi.org/10.1038/s41598-021-86339-3
_version_ 1783669780209729536
author Tuktamyshev, Artur
Fedorov, Alexey
Bietti, Sergio
Vichi, Stefano
Tambone, Riccardo
Tsukamoto, Shiro
Sanguinetti, Stefano
author_facet Tuktamyshev, Artur
Fedorov, Alexey
Bietti, Sergio
Vichi, Stefano
Tambone, Riccardo
Tsukamoto, Shiro
Sanguinetti, Stefano
author_sort Tuktamyshev, Artur
collection PubMed
description We investigated the nucleation of Ga droplets on singular GaAs(111)A substrates in the view of their use as the seeds for the self-assembled droplet epitaxial quantum dots. A small critical cluster size of 1–2 atoms characterizes the droplet nucleation. Low values of the Hopkins-Skellam index (as low as 0.35) demonstrate a high degree of a spatial order of the droplet ensemble. Around [Formula: see text] the droplet size distribution becomes bimodal. We attribute this observation to the interplay between the local environment and the limitation to the adatom surface diffusion introduced by the Ehrlich–Schwöbel barrier at the terrace edges.
format Online
Article
Text
id pubmed-7994575
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-79945752021-03-29 Nucleation of Ga droplets self-assembly on GaAs(111)A substrates Tuktamyshev, Artur Fedorov, Alexey Bietti, Sergio Vichi, Stefano Tambone, Riccardo Tsukamoto, Shiro Sanguinetti, Stefano Sci Rep Article We investigated the nucleation of Ga droplets on singular GaAs(111)A substrates in the view of their use as the seeds for the self-assembled droplet epitaxial quantum dots. A small critical cluster size of 1–2 atoms characterizes the droplet nucleation. Low values of the Hopkins-Skellam index (as low as 0.35) demonstrate a high degree of a spatial order of the droplet ensemble. Around [Formula: see text] the droplet size distribution becomes bimodal. We attribute this observation to the interplay between the local environment and the limitation to the adatom surface diffusion introduced by the Ehrlich–Schwöbel barrier at the terrace edges. Nature Publishing Group UK 2021-03-25 /pmc/articles/PMC7994575/ /pubmed/33767304 http://dx.doi.org/10.1038/s41598-021-86339-3 Text en © The Author(s) 2021 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Tuktamyshev, Artur
Fedorov, Alexey
Bietti, Sergio
Vichi, Stefano
Tambone, Riccardo
Tsukamoto, Shiro
Sanguinetti, Stefano
Nucleation of Ga droplets self-assembly on GaAs(111)A substrates
title Nucleation of Ga droplets self-assembly on GaAs(111)A substrates
title_full Nucleation of Ga droplets self-assembly on GaAs(111)A substrates
title_fullStr Nucleation of Ga droplets self-assembly on GaAs(111)A substrates
title_full_unstemmed Nucleation of Ga droplets self-assembly on GaAs(111)A substrates
title_short Nucleation of Ga droplets self-assembly on GaAs(111)A substrates
title_sort nucleation of ga droplets self-assembly on gaas(111)a substrates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7994575/
https://www.ncbi.nlm.nih.gov/pubmed/33767304
http://dx.doi.org/10.1038/s41598-021-86339-3
work_keys_str_mv AT tuktamyshevartur nucleationofgadropletsselfassemblyongaas111asubstrates
AT fedorovalexey nucleationofgadropletsselfassemblyongaas111asubstrates
AT biettisergio nucleationofgadropletsselfassemblyongaas111asubstrates
AT vichistefano nucleationofgadropletsselfassemblyongaas111asubstrates
AT tambonericcardo nucleationofgadropletsselfassemblyongaas111asubstrates
AT tsukamotoshiro nucleationofgadropletsselfassemblyongaas111asubstrates
AT sanguinettistefano nucleationofgadropletsselfassemblyongaas111asubstrates

Ejemplares similares