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Two-Dimensional Excitons in A Strongly Localized Regime in CdTe/ZnTe Superlattices

  • Y. Hefetz (a1), D. Lee (a1), A. V. Nurmikko (a1), S. Sivananthan (a2), X. Chu (a2) and J.-P. Faurie (a2)...

Abstract

Time-resolved spectroscopy of the recombining exciton state in a highly strained II-VI semiconductor superlattice CdTe/ZnTe reveals strong localization effects at low lattice temperatures. Such phenomena originate naturally from small deviations in structural perfection on a monolayer scale in a strained superlattice with a small valence band offset. The quasi-2D aspect enhances the localization phenomena further.

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(1) Monfroy, G., Sivananthan, S., Chu, X., Faurie, J.-P., Knox, R.D., and Staudenmann, J.L., Appl. Phys. Lett. 49, 152 (1986)
(2) Miles, R., Wu, G., Johnson, M., McGill, T., Faurie, J.-P., and Sivananthan, S., Appl. Phys. Lett. 48, 1383 (1986)
(3) Nurmikko, A.V., Gunshor, R.L., and Kolodziejski, L.A., IEEE J. Quant. Electr. QE–22, 1785 (1986)
(4) Hefetz, Y., Lee, D., Nurmikko, A.V., Sivananthan, S., Chu, X., and Faurie, J.-P., Phys. Rev B34, 4423 (1986)
(5) Hefetz, Y., Goltsos, W., Nurmikko, A.V., Kolodziejski, L.A., Gunshor, R.L., Appl. Phys. Lett. 48, 372 (1986)
(6) Chang, S.-K. and Nakata, H., unpublished
(7) Cohen, E. and Sturge, M.D., Phys. Rev. H25, 3828 (1982)

Two-Dimensional Excitons in A Strongly Localized Regime in CdTe/ZnTe Superlattices

  • Y. Hefetz (a1), D. Lee (a1), A. V. Nurmikko (a1), S. Sivananthan (a2), X. Chu (a2) and J.-P. Faurie (a2)...

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