F-sum rule and effective masses in superlattices

N. F. Johnson, H. Ehrenreich, K. C. Hass, T. C. McGill

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)2352-2355
Number of pages4
JournalPhysical Review Letters
Issue number20
StatePublished - Jan 1 1987

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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