Band offsets and lattice-mismatch effects in strained-layer CdTe/ZnTe superlattices
- 15 October 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (11), 7740-7748
- https://doi.org/10.1103/physrevb.38.7740
Abstract
We present a detailed investigation of the combined effects of band offsets and lattice mismatch on the subband structure of strained-layer CdTe/ZnTe superlattices. It is shown that, depending on the layer thicknesses, the superlattice may either have a type-I configuration, where electron and hole are mostly localized within CdTe layers, or a type-II configuration. Moreover, the hole ground state may either be the heavy-hole subband or the light-hole one. The results are compared with photoluminescence data and the value Δ=60±20 meV is obtained for the zero-strain valence-band offset.
Keywords
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