Strained AlGaInAs on InP: Bandgap dependence on composition—Model benchmark and optimization
Influence of chemical composition on the bandgap of AlGaInAs deposited on InP is often calculated using models for unstrained composition and then corrected for strain-induced bandgap energy changes using deformation potentials. This method relies on up to 25 coefficients, many of which are burdened...
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| Veröffentlicht in: | Journal of applied physics 2023-12, Vol.134 (24) |
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| container_title | Journal of applied physics |
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| creator | Zyskowski, Marcin de Louw, Nick Kleijn, Steven Díaz Otero, Francisco Javier |
| description | Influence of chemical composition on the bandgap of AlGaInAs deposited on InP is often calculated using models for unstrained composition and then corrected for strain-induced bandgap energy changes using deformation potentials. This method relies on up to 25 coefficients, many of which are burdened with large uncertainty. In this paper, a large set of experimental data is used to verify the accuracy of existing approaches and to search for optimal deformation potentials. It is shown that the main source of inaccuracy is not the deformation potentials, but the unstrained bandgap formulas. Additionally, a novel model is proposed, yielding the highest accuracy on our dataset. For the first time, composition determination of a quaternary alloy on InP is reported using inductively coupled plasma-optical emission spectrometry, which is used as a benchmark for modeling. |
| doi_str_mv | 10.1063/5.0173760 |
| format | Article |
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This method relies on up to 25 coefficients, many of which are burdened with large uncertainty. In this paper, a large set of experimental data is used to verify the accuracy of existing approaches and to search for optimal deformation potentials. It is shown that the main source of inaccuracy is not the deformation potentials, but the unstrained bandgap formulas. Additionally, a novel model is proposed, yielding the highest accuracy on our dataset. 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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Accuracy Applied physics Benchmarks Chemical composition Deformation Energy gap Inductively coupled plasma Optical emission spectroscopy Quaternary alloys |
| title | Strained AlGaInAs on InP: Bandgap dependence on composition—Model benchmark and optimization |
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