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X-ray near-edge structure of the II-VI group ternary compounds: Experimental and theoretical studies of CdxHg1-xTe and CdxZn1-xTe

Physical Review B, ISSN: 0163-1829, Vol: 42, Issue: 17, Page: 11114-11122
1990
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Measurements of the x-ray-absorption edges for ternary II-VI group semiconducting compounds CdxHg1-xTe and CdxZn1-xTe have been made for the Cd and Te L edges and the K edge of Zn. These data are compared with calculations based on electron densities of states for the conduction-band states in CdxHg1-xTe and CdxZn1-xTe for x=0.0,0.5,1.0. The calculations, based on linear-muffin-tin-orbital results, cover energies up to about 17 eV above the conduction-band edge. Both the experimental data and calculated density of states are used to analyze results for the ternary compounds in terms of a virtual-crystal model based on CdTe, HgTe, and ZnTe. Using a virtual-crystal model based on the Te L1 and L3 x-ray edges for CdTe, HgTe, and ZnTe, predicted edges for the ternary compounds Cd-Hg-Te and Cd-Zn-Te are compared with the direct experimental data and theoretical calculations. Results obtained in these two ways are found to be in good agreement with each other. © 1990 The American Physical Society.

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