Document
type: Class

Nucleation and diffusion processes during the stacking of bilayer quantum dot InAs/GaAs heterostructures
type: Document
freetext keyword: Critical thickness; Diffusion parameters; InAs-quantum dots; Strain; Vertical stacking Crystallization; Curve fitting; Diffusion; III-V semiconductors; Indium arsenide; Mean field theory; Nanocrystals; Nucleation; Numerical models; Reflection high energy electron diffraction; Critical thickness; Diffusion parameters; Growth-mode transition; Nucleation parameters; Oscillatory behaviors; Quasi-equilibrium conditions; Spacer layer thickness; Vertical alignment; Semiconductor quantum dots
has funding vehicle: INFR-2015-01-255489, CB 2015- 257358, PNCPN2014-01-248071
related by: authorship_46362
origen: scopus
type: Information Content Entity
related by: authorship_46361
has publication venue: Journal of Crystal Growth
estado: published
doi: 10.1016/j.jcrysgro.2020.125959
date time value: review date 7186
type: Review
related by: authorship_46364
related by: authorship_46366
related by: authorship_46363
related by: authorship_46365
abstract: The growth front stacking of bilayer quantum dot (BQD) InAs/GaAs heterostructures was studied by reflection high-energy electron diffraction (RHEED). The mean-field theory was employed to describe the quantum dots (QDs) nucleation, which was experimentally monitored during the intensity changes of the (0 0 2)-RHEED diffraction spot along the two- to three-dimensional (2D-3D) InAs growth mode transition. The diffusion parameter obtained from fits of the 2D-3D transition curves was associated to the rate of atoms supply from 2D and 3D islands precursors. The variation of the nucleation parameters during the vertical alignment of QDs associated to the coupling of strain fields were related to the changes of the QDs size and the wetting layer thickness. Numerical simulations indicated that these changes reduce the strain in the BQD heterostructures. Damped oscillatory behavior was observed for the InAs/GaAs critical thickness (Hc) as a function of the number of BQD. The bilayer number after which Hc did not vary significantly, coincided with the one without important variation of the diffusion parameters. The number of BQD layers required to reach this quasi-equilibrium condition depends on the growth parameters of the first layer and the spacer layer thickness, as supported by numerical simulations. © 2020 Elsevier B.V.
volume: 555
crisid: 7186
type: Generically Dependent Continuant
most specific type: Review
type: Thing
type: Continuant
artnum: 125959
most specific type: Document
type: Entity
e iscopus: 2-s2.0-85097162483
type: Article

Journal of Crystal Growth
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type: Generically Dependent Continuant
type: Information Content Entity
type: Collection
type: Journal
type: Thing
type: Document
publication venue for: Nucleation and diffusion processes during the stacking of bilayer quantum dot InAs/GaAs heterostructures
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Entity
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INFR-2015-01-255489, CB 2015- 257358, PNCPN2014-01-248071
type: Relationship
type: BFO_0000020
type: Entity
type: Thing
type: Grant
type: Continuant
funding vehicle for: Nucleation and diffusion processes during the stacking of bilayer quantum dot InAs/GaAs heterostructures

Review
type: Class

Generically Dependent Continuant
type: Class

RDF description of Nucleation and diffusion processes during the stacking of bilayer quantum dot InAs/GaAs heterostructures - http://orbis.uaslp.mx/vivo/individual/scopus7185
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date: 2026-08-25T07:00:34
publisher: vivo
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Article
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