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- Title
Modeling InAs quantum-dot formation on the side surface of GaAs nanowires.
- Authors
Bolshakov, A.; Dubrovskii, V.; Yan, Xin; Zhang, Xia; Ren, Xiaomin
- Abstract
We have theoretically studied the formation of InAs quantum dots (QDs) on the side surface of GaAs nanowires (NWs). The effective energies of formation of a thin InAs layer and QDs on the NW side surface are compared with allowance for elastic stresses at the radial heteroboundary of two materials with lattice mismatch. The concept of a critical thickness of the external (wetting) layer is introduced, at which the mechanical stresses stimulate three-dimensional growth of QDs. The dependence of the critical layer thickness on the NW diameter and elastic constants of the system is determined. The phenomenon of partial filling of the NW side surface by QDs is explained by a decrease in the thickness of a deposited InAs layer with increasing height. The results of modeling agree well with the available experimental data.
- Subjects
QUANTUM dots; INDIUM arsenide; SURFACES (Technology); GALLIUM arsenide; NANOWIRES; STRAINS &; stresses (Mechanics); ELASTIC constants; COMPARATIVE studies
- Publication
Technical Physics Letters, 2013, Vol 39, Issue 12, p1047
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/S1063785013120043