Formation of low-dimensional structures in the InSb/AlAs heterosystem

Journal Article · Fri Sep 15 04:00:00 EDT 2017 · Semiconductors

DOI:https://doi.org/10.1134/S1063782617090020· OSTI ID:22756375

Bakarov, A. K.; Putyato, M. A.; Emelyanov, E. A.; Kolotovkina, D. A.; Gutakovskii, A. K.; Shamirzaev, T. S. ^[1]

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1. Russian Academy of Sciences, Rzhanov Institute of Semiconductor Physics, Siberian Branch (Russian Federation)

Low-dimensional quantum-well and nanoisland heterostructures formed in the InSb/AlAs system by molecular-beam epitaxy are studied by transmission electron microscopy and steady-state photoluminescence spectroscopy. The structures are grown under conditions of alternate In and Sb deposition (the socalled atomic-layer epitaxy mode) and the simultaneous deposition of materials (the traditional molecularbeam epitaxy mode). In both modes of growth, at a nominal amount of the deposited material in a single layer, large-sized (200 nm–1 μm) imperfect islands arranged on the In{sub x}Al{sub 1–} {sub x}Sb{sub y}As{sub 1–y} quantum-well layer are formed. In the heterostructures grown under conditions of atomic layer epitaxy, the islands are surrounded by ring-shaped arrays of much smaller (~10 nm), coherently strained islands consisting of the In{sub x}Al{sub 1–} {sub x}Sb{sub y}As{sub 1–} {sub y} alloy as well. The composition of the alloy is defined by the intermixing of Group-V materials in the stage of InSb deposition and by the intermixing of materials because of the segregation of In and Sb atoms during overgrowth of the InSb layer by an AlAs layer.

• OSTI ID: 22756375
• Journal Information: Semiconductors, Journal Name: Semiconductors Journal Issue: 9 Vol. 51; ISSN SMICES; ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
ALUMINIUM ARSENIDES
CRYSTAL GROWTH
DEPOSITION
DEPOSITS
INDIUM ANTIMONIDES
ISLANDS
LABELLING
MASS SPECTROSCOPY
MATERIALS
MOLECULAR BEAM EPITAXY
NUCLEAR MAGNETIC RESONANCE
QUANTUM WELLS
TRANSMISSION ELECTRON MICROSCOPY