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Electronic states and vibration spectra of CdTe/ZnTe quantum dot superlattices

  • Proceedings of the Conference Dedicated to O. V. Losev (1903–1942) (Nizhni Novgorod, Russia, March 17–20, 2003)
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Abstract

Electronic and vibrational states in CdTe/ZnTe quantum dot superlattices are studied using optical spectroscopy techniques (photoluminescence in a wide temperature range, IR reflection, and Raman scattering). The effect of the ZnTe barrier layer thickness on the luminescence spectra of the structures is discussed. The luminescence from electronically coupled islands is assumed to be due to spatially indirect excitons because of the specific features of the CdTe/ZnTe heterostructure band structure. A combination of quantum-dot vibrational modes, which has not been observed earlier, is detected in the Raman spectra. Analysis of the lattice IR reflection spectra shows that, in the case of large barrier thicknesses between the quantum-dot planes, elastic stresses are concentrated in the Zn1−x CdxTe layers, whereas in structures with lower barrier thicknesses the elastic-strain distribution exhibits a more complicated pattern.

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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia

    V. S. Bagaev, L. K. Vodop’yanov, V. S. Vinogradov, V. V. Zaitsev, S. P. Kozyrev, N. N. Mel’nik & E. E. Onishchenko

  2. Institute of Physics, Polish Academy of Sciences, Warsaw, 02-668, Poland

    G. Karczewski

Authors
  1. V. S. Bagaev
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  2. L. K. Vodop’yanov
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  3. V. S. Vinogradov
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  4. V. V. Zaitsev
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  5. S. P. Kozyrev
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  6. N. N. Mel’nik
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  7. E. E. Onishchenko
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  8. G. Karczewski
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__________

Translated from Fizika Tverdogo Tela, Vol. 46, No. 1, 2004, pp. 171–173.

Original Russian Text Copyright © 2004 by Bagaev, Vodop’yanov, Vinogradov, Za\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \)tsev, Kozyrev, Mel’nik, Onishchenko, Karczewski.

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Bagaev, V.S., Vodop’yanov, L.K., Vinogradov, V.S. et al. Electronic states and vibration spectra of CdTe/ZnTe quantum dot superlattices. Phys. Solid State 46, 173–175 (2004). https://doi.org/10.1134/1.1641947

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  • DOI: https://doi.org/10.1134/1.1641947

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