Far-infrared study of alloying in the HgTe-CdTe superlattice
- 29 September 1986
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 49 (13) , 806-808
- https://doi.org/10.1063/1.97553
Abstract
The far‐infrared reflectivity spectra of three HgTe‐CdTe superlattices from two sources [HgTe/CdTe thicknesses (Å/Å): 64/26, 7/35, 32/57] have been measured at 300, 77, and 6 K. Analysis of transverse optical phonon structure between 80 and 180 cm−1 with different alloying models shows that the first of these superlattices contains HgTe and CdTe with no evidence of significant mixing, whereas the others contain HgTe and homogeneous Hg1−xCdxTe. An earlier study of the HgTe‐CdTe band gap also indicated homogeneous alloying. The reflectivity data were analyzed with a superlattice dielectric function which is shown to be valid in the far infrared.Keywords
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