Band offsets in cubic GaN/AlN superlattices
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Experimentalphysik, Universitaet Paderborn, Warburger Strasse 100, D-33098 (Germany)
- Lehrstuhl fuer Theoretische Physik, Universitaet Paderborn, Warburger Strasse 100, D-33098 (Germany)
- Institut d'Electronique Fondamentale, UMR 8622 CNRS, University Paris-Sud 11, F-91405 Orsay (France)
The presently unknown band offset in nonpolar cubic GaN/AlN superlattices is investigated by inter-sub-band and interband spectroscopies as well as ab initio calculations. On one hand, the conduction-band offset (CBO) has been determined from the comparison of the measured transition energies with model calculations within the effective mass approximation. On the other hand, the valence-band offset (VBO) and the CBO are accurately simulated by calculating many-body corrections within the GW approximation on top of hybrid-functional density functional theory calculations. Thus, a CBO of (1.4{+-}0.1) eV and a VBO of (0.5{+-}0.1) eV is obtained as a result of both approaches.
- OSTI ID:
- 21544768
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 19 Vol. 83; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
APPROXIMATIONS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CORRECTIONS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DENSITY FUNCTIONAL METHOD
EFFECTIVE MASS
EVALUATION
GALLIUM COMPOUNDS
GALLIUM NITRIDES
MANY-BODY PROBLEM
MASS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SIMULATION
SPECTROSCOPY
SUPERLATTICES
VARIATIONAL METHODS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ALUMINIUM NITRIDES
APPROXIMATIONS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CORRECTIONS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DENSITY FUNCTIONAL METHOD
EFFECTIVE MASS
EVALUATION
GALLIUM COMPOUNDS
GALLIUM NITRIDES
MANY-BODY PROBLEM
MASS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SIMULATION
SPECTROSCOPY
SUPERLATTICES
VARIATIONAL METHODS