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qcl:faq
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qcl:faq [2021/06/18 07:57] thomas.grange |
qcl:faq [2022/10/12 09:27] (current) thomas.grange |
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| $E_{\rm v,av}$ is the average energy of heavy hole (hh), light hole (lh) and split-off hole (so). | $E_{\rm v,av}$ is the average energy of heavy hole (hh), light hole (lh) and split-off hole (so). | ||
| $\Delta_{\rm so}$ is the spin-orbit split-off energy. | $\Delta_{\rm so}$ is the spin-orbit split-off energy. | ||
| + | |||
| + | These two different options have different consequences in how the temperature dependence of the bandgap is accounted. Indeed: | ||
| * Option a) Specify conduction band offset (CBO) $E_{\rm c}$\\ ''<UseConductionBandOffset>yes</UseConductionBandOffset>'' | * Option a) Specify conduction band offset (CBO) $E_{\rm c}$\\ ''<UseConductionBandOffset>yes</UseConductionBandOffset>'' | ||
| + | |||
| + | As a consequence, the band offset of the light hole becomes temperature dependent: | ||
| $$E_{\rm hh}(T) = E_{\rm c} - E_{\rm gap}(T)$$ | $$E_{\rm hh}(T) = E_{\rm c} - E_{\rm gap}(T)$$ | ||
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| * Option b) Specify valence band offset (VBO) $E_{\rm v,av}$\\ The conduction band edge $E_{\rm c}$ is calculated and depends on temperature.\\ ''<UseConductionBandOffset>no</UseConductionBandOffset>'' (default) | * Option b) Specify valence band offset (VBO) $E_{\rm v,av}$\\ The conduction band edge $E_{\rm c}$ is calculated and depends on temperature.\\ ''<UseConductionBandOffset>no</UseConductionBandOffset>'' (default) | ||
qcl/faq.txt ยท Last modified: 2022/10/12 09:27 by thomas.grange
