| Numéro |
Le Journal de Physique IV
Volume 03, Numéro C5, Octobre 1993
Third International Conference on Optics of Excitons in Confined
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|---|---|---|
| Page(s) | C5-429 - C5-432 | |
| DOI | https://doi.org/10.1051/jp4:1993592 | |
Le Journal de Physique IV 03 (1993) C5-429-C5-432
DOI: 10.1051/jp4:1993592
Non-linear piezoelectric effect in CdTe and CdZnTe
R. ANDRÉ1, C. BODIN1, J. CIBERT1, L.S. DANG1 and G. FEUILLET21 Laboratoire de Spectrométrie Physique, URA 08 du CNRS, Université Joseph Fourier, Grenoble I, BP. 87, 38402 Saint Martin d'Hères cedex, France
2 DRFMC - SP2M - PSC, Centre d'Etudes Nucléaires de Grenoble, BP. 85X, 38041 Grenoble cedex, France
Abstract
Strained quantum wells (QWs) grown along the polar axis (111) in a zincblende semiconductor exhibit a piezoelectric field. This field strongly modifies the energy of excitons confined in QWs. We have extracted, from optical measurements of excitonic transitions, the piezoelectric field value in a large set of QWs : CdTe/CdZnTe, CdTe/CdMnTe, CdZnTe/CdMnTe. By suitably choosing the composition of alloys, we have obtained different values of strains (compressive or extensive) due to the lattice mismatch between QWs and barriers. The non-linear piezoelectric effect appears clearly when plotting the piezoelectric tensor component e14 versus lattice mismatch. For example el4 increases from 0.07 C/m2 to 0.15 C/m2 when the lattice mismatch varies from - 0.3% to - 1.7%.
© EDP Sciences 1993