Strain and density dependent valence-band masses in InGaAs/GaAs and GaAs/GaAsP strained-layer structures

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:5709380

Jones, E D; Biefeld, R M; Klem, J F; Lyo, S K

Low-temperature magnetoluminescence measurements have been performed in several n-type InGaAs/GaAs single-strained-quantum-wells with varying internal strain and a n-type GaAs/GaAsP strained-layer-superlattice. Using newly discovered selection rules, an analysis of the data yields simultaneous information about the conduction and valence-band dispersion curves from a single sample. We find that the conduction-bands are parabolic for all of our structures, with effective mass in the range of 0.068 to 0.074m/sub 0/. The valence-bands are found to be nonparabolic and strain dependent. A simple two-band model is used to analyze the nonparabolicity in terms of a zone-center mass m and a parameter C which is expressed in terms of the light-hole and heavy-hole energy difference. From the two-band model, predictions for the valence-band mass as a function of the 2D-carrier concentration can be made. These predictions are found to be in good agreement with recent cyclotron resonance measurements of the mass in p-type samples. 10 refs., 6 figs., 1 tab.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5709380
• Report Number(s): SAND-89-1116C; CONF-8909185-1; ON: DE89016882
• Resource Relation: Conference: 16. symposium on gallium arsenide and related compounds, Karuizawa, Japan, 25-29 Sep 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
GALLIUM ARSENIDES
BAND THEORY
INDIUM ARSENIDES
CRYSTAL LATTICES
DENSITY
MAGNETIC FIELDS
PHOTOLUMINESCENCE
SEMICONDUCTOR MATERIALS
STRAINS
SUPERLATTICES
ARSENIC COMPOUNDS
ARSENIDES
CRYSTAL STRUCTURE
GALLIUM COMPOUNDS
INDIUM COMPOUNDS
LUMINESCENCE
MATERIALS
PHYSICAL PROPERTIES
PNICTIDES
360603* - Materials- Properties