On Concentration Dependences of the Band Parameters in AIIBVI Solid Solutions with Structural Phase Transitions
- 1 August 1989
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 154 (2) , 609-621
- https://doi.org/10.1002/pssb.2221540220
Abstract
The connection between the structure of solid solution and its spectroscopic and band parameters is discussed on the example of ZnxCd1−xSe and Zn1−xMgxS systems with the structure phase transition: zinc blende (ZB)‐wurtzite (W). It is shown that if the Eg(x) dependence is parabolic for the ZB and W pure structure ranges, it is linear in the phase transition range (for the Zn1−xMgxS system). Eg(x) is always higher for the anisotropic crystals (with stacking faults (SF) and W) than for the ZB ones depending on the more ionic character of their chemical bond. The influence of the disorder potential due to composition x and SF concentration fluctuations on the exciton and band parameters of the solid solutions is considered.Keywords
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