Answers are grounded in this paper and cite their sources.
The f-sum rule, relating effective masses to oscillator strengths, is extended to semiconducting superlattices and applied to GaAs-(Ga,Al)As and HgTe-CdTe. This novel approach is implemented analytically by use of the envelope-function approximation to calculate both parallel and perpendicular masses and is used to account for their difference physically. Agreement with experiment is excellent, but in HgTe-CdTe only if the valence-band offset is small.
No takes yet. Share an insight, caveat, or question.
Johnson et al. (1987) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: