Dependence of the optical properties of semiconductor alloys on the degree of long-range order

Dependence of the optical properties of semiconductor alloys on the degree of long-range order

Many III-V semiconductor alloys exhibit spontaneous [111] alternate monolayer ordering when grown from the vapor phase. This is manifested by the splitting of the valence-band maximum and by a reduction in the direct band gap. We show here how these features can be used to deduce quantitatively the...

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Veröffentlicht in:Applied physics letters 1993-04, Vol.62 (16), p.1937-1939
Hauptverfasser: SU-HUAI WEI, LAKS, D. B, ZUNGER, A
Format: Artikel
Sprache:eng
Schlagworte:
360606 > Other Materials-- Physical Properties-- (1992-)
ALLOY SYSTEMS
ALLOYS
ARSENIC COMPOUNDS
ARSENIDES
Condensed matter: electronic structure, electrical, magnetic, and optical properties
CRYSTAL STRUCTURE
Electron density of states and band structure of crystalline solids
Electron states
ELECTRONIC STRUCTURE
ENERGY GAP
EPITAXY
Exact sciences and technology
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
GALLIUM PHOSPHIDES
INDIUM ARSENIDES
INDIUM COMPOUNDS
INDIUM PHOSPHIDES
MATERIALS
MATERIALS SCIENCE
OPTICAL PROPERTIES
ORDER PARAMETERS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
Physics
PNICTIDES 360602 > Other Materials-- Structure & Phase Studies
SEMICONDUCTOR MATERIALS
TERNARY ALLOY SYSTEMS
VAPOR PHASE EPITAXY
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Zusammenfassung:Many III-V semiconductor alloys exhibit spontaneous [111] alternate monolayer ordering when grown from the vapor phase. This is manifested by the splitting of the valence-band maximum and by a reduction in the direct band gap. We show here how these features can be used to deduce quantitatively the degree of long-range order in a given sample. Examples are given for Ga0.5In0.5P and Ga0.5In0.5As alloys.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.109496