Heavy and light exciton states in c-AlGaN/GaN asymmetric double quantum wells
| Autor: | J.G. Rojas-Briseño, M.E. Mora-Ramos, J.C. Martínez-Orozco, Isaac Rodríguez-Vargas |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter::Quantum Gases
010302 applied physics Physics Photoluminescence Condensed Matter::Other Exciton Binding energy 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Schrödinger equation Condensed Matter::Materials Science symbols.namesake Effective mass (solid-state physics) Variational method 0103 physical sciences symbols Energy level Atomic physics 0210 nano-technology Quantum well |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 124:114248 |
| ISSN: | 1386-9477 |
| DOI: | 10.1016/j.physe.2020.114248 |
| Popis: | This work presents a theoretical study of the lowest heavy- and light-exciton energy states in a c-AlGaN/GaN asymmetric double quantum well. It makes use of the variational method to determine the eigenstates of the corresponding Schrodinger equation, within the effective mass and parabolic band approximations. We studied the behavior of the exciton energy, the corresponding binding energy as well as the photoluminescence energy peak as a function of the left quantum well width and the central barrier height. Direct and indirect exciton states can be obtained depending on the quantum well configuration. The motivation for this study comes from the experimental reports by T. Wecker et al., in which they measure the photoluminescence energy peak in similar systems with different aluminum concentrations. The comparison of our results with the experimental outputs shows good agreement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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