Spectroscopic determination of the bandgap crossover composition in MBE-grown AlxGa1-xAs
Abstract
The aluminum concentration dependence of the energies of the direct and indirect bandgaps arising from the Γ and X conduction bands are measured at 1.7 K in the semiconductor alloy AlxGa1-xAs. The composition at which the bands cross is determined from photoluminescence of molecular-beam epitaxy samples grown very close to crossover. The use of resonant laser excitation and the improved sample linewidth allows precise determination of the bound exciton transition energies. Moreover, photoluminescence excitation spectroscopy is used to measure the binding energies of the donor-bound excitons and the Γ free exciton binding energy.
- Authors:
-
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1184998
- Report Number(s):
- SAND-2014-20322J
Journal ID: ISSN 0021-4922; 547684
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Japanese Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 54; Journal Issue: 4; Journal ID: ISSN 0021-4922
- Publisher:
- Japan Society of Applied Physics
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Fluegel, Brian, Alberi, Kirstin, Reno, John, and Mascarenhas, Angelo. Spectroscopic determination of the bandgap crossover composition in MBE-grown AlxGa1-xAs. United States: N. p., 2015.
Web. doi:10.7567/JJAP.54.042402.
Fluegel, Brian, Alberi, Kirstin, Reno, John, & Mascarenhas, Angelo. Spectroscopic determination of the bandgap crossover composition in MBE-grown AlxGa1-xAs. United States. https://doi.org/10.7567/JJAP.54.042402
Fluegel, Brian, Alberi, Kirstin, Reno, John, and Mascarenhas, Angelo. Thu .
"Spectroscopic determination of the bandgap crossover composition in MBE-grown AlxGa1-xAs". United States. https://doi.org/10.7567/JJAP.54.042402. https://www.osti.gov/servlets/purl/1184998.
@article{osti_1184998,
title = {Spectroscopic determination of the bandgap crossover composition in MBE-grown AlxGa1-xAs},
author = {Fluegel, Brian and Alberi, Kirstin and Reno, John and Mascarenhas, Angelo},
abstractNote = {The aluminum concentration dependence of the energies of the direct and indirect bandgaps arising from the Γ and X conduction bands are measured at 1.7 K in the semiconductor alloy AlxGa1-xAs. The composition at which the bands cross is determined from photoluminescence of molecular-beam epitaxy samples grown very close to crossover. The use of resonant laser excitation and the improved sample linewidth allows precise determination of the bound exciton transition energies. Moreover, photoluminescence excitation spectroscopy is used to measure the binding energies of the donor-bound excitons and the Γ free exciton binding energy.},
doi = {10.7567/JJAP.54.042402},
journal = {Japanese Journal of Applied Physics},
number = 4,
volume = 54,
place = {United States},
year = {Thu Mar 12 00:00:00 EDT 2015},
month = {Thu Mar 12 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Electronic Properties of GaAs/AlAs Nanostructure Superlattice for Near Infrared Devices at Low Temperatures
journal, January 2016
- Barkissy, D.; Nafidi, A.; Boutramine, A.
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