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

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

Abstract 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 ind...

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Autores principales: Artur Tuktamyshev, Alexey Fedorov, Sergio Bietti, Stefano Vichi, Riccardo Tambone, Shiro Tsukamoto, Stefano Sanguinetti
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
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Science
Q
Acceso en línea:https://doaj.org/article/e373aff5a1c44ae696f1dbad66773071
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spelling oai:doaj.org-article:e373aff5a1c44ae696f1dbad667730712021-12-02T17:04:07ZNucleation of Ga droplets self-assembly on GaAs(111)A substrates10.1038/s41598-021-86339-32045-2322https://doaj.org/article/e373aff5a1c44ae696f1dbad667730712021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86339-3https://doaj.org/toc/2045-2322Abstract 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 $$350\,^{\circ }\hbox {C}$$ 350 ∘ C 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.Artur TuktamyshevAlexey FedorovSergio BiettiStefano VichiRiccardo TamboneShiro TsukamotoStefano SanguinettiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Artur Tuktamyshev
Alexey Fedorov
Sergio Bietti
Stefano Vichi
Riccardo Tambone
Shiro Tsukamoto
Stefano Sanguinetti
Nucleation of Ga droplets self-assembly on GaAs(111)A substrates
description Abstract 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 $$350\,^{\circ }\hbox {C}$$ 350 ∘ C 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 article
author Artur Tuktamyshev
Alexey Fedorov
Sergio Bietti
Stefano Vichi
Riccardo Tambone
Shiro Tsukamoto
Stefano Sanguinetti
author_facet Artur Tuktamyshev
Alexey Fedorov
Sergio Bietti
Stefano Vichi
Riccardo Tambone
Shiro Tsukamoto
Stefano Sanguinetti
author_sort Artur Tuktamyshev
title 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_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_sort nucleation of ga droplets self-assembly on gaas(111)a substrates
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/e373aff5a1c44ae696f1dbad66773071
work_keys_str_mv AT arturtuktamyshev nucleationofgadropletsselfassemblyongaas111asubstrates
AT alexeyfedorov nucleationofgadropletsselfassemblyongaas111asubstrates
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AT stefanovichi nucleationofgadropletsselfassemblyongaas111asubstrates
AT riccardotambone nucleationofgadropletsselfassemblyongaas111asubstrates
AT shirotsukamoto nucleationofgadropletsselfassemblyongaas111asubstrates
AT stefanosanguinetti nucleationofgadropletsselfassemblyongaas111asubstrates
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