Interband magnetoabsorption in strained epitaxially grown ZnTe and ZnSe

Sang Hoon Lee, F. Michl, U. Rössler, M. Dobrowolska, J. K. Furdyna

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Abstract

Interband absorption in ultrathin epilayers of ZnTe and ZnSe has been measured in magnetic fields up to 6 T with photon energies below and above the fundamental gap. The spectra clearly show the evolution of the 1 s and 2s exciton states and of the rich structure arising from the formation of Landau levels in the continuum. The observed spectral features are analyzed using the 8×8 k·p model, which takes into account the residual strain introduced during sample preparation. From this analysis we extract highly accurate values for the energy gaps and the exciton binding energies. Effects of electron-hole correlation and resonant magnetopolaron coupling are also clearly detected in the continuum absorption. We discuss the dependence of these effects on Landau quantum number and the magnetic field by comparing the experimental transition energies with calculated ones.

Original languageEnglish
Pages (from-to)9695-9704
Number of pages10
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume57
Issue number16
Publication statusPublished - 1998 Apr 15
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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