Band offset between cubic GaN and AlN from intra- and interband spectroscopy of superlattices

Journal Article · Mon Nov 01 04:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3518288· OSTI ID:21428729

Mietze, C; Lischka, K; As, D J ^[1]; DeCuir, Jr, E A; Manasreh, M O ^[2]

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1. University of Paderborn, Faculty of Science, Department of Physics, Warburger Strasse 100 D-33098 Paderborn (Germany)
2. Department of Electrical Engineering, University of Arkansas, 3217 Bell Engineering Center, Fayetteville, Arkansas 72701 (United States)

By the analysis of intra- and intersubband transitions in GaN/AlN superlattices the band offset is determined experimentally. Superlattice structures with different period lengths were fabricated by plasma-assisted molecular beam epitaxy 3C-SiC substrates. The structural properties were studied by high resolution X-ray diffraction, revealing a high structural perfection of the superlattice region with several peaks in the X-ray spectra. Infrared absorbance spectroscopy revealed clear intrasubband transitions in the spectral region of 1.55 {mu}m measured at room temperature. Clear intersubband transitions were observed by photoluminescence at room temperature. These transition energies were compared to calculated energies using a 1D Poisson Schroedinger solver. For the calculations standard parameters for cubic GaN and AlN were used, while the band offset between GaN and AlN was varied. Optimal agreement between experimental and theoretical data was obtained for a band offset {Delta}E{sub C}:{Delta} E{sub V} of 55:45.

• OSTI ID: 21428729
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1292; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
CRYSTAL GROWTH METHODS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFRACTION
ELECTRONIC STRUCTURE
EMISSION
EPITAXY
GALLIUM COMPOUNDS
GALLIUM NITRIDES
LUMINESCENCE
MOLECULAR BEAM EPITAXY
NITRIDES
NITROGEN COMPOUNDS
PHOTOLUMINESCENCE
PHOTON EMISSION
PNICTIDES
SCATTERING
SILICON CARBIDES
SILICON COMPOUNDS
SPECTRA
SPECTROSCOPY
SUBSTRATES
SUPERLATTICES
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION
X-RAY SPECTRA