Abstract
Conditions providing a thermodynamic advantage governing the self-assembly of Zn and Te impurities in metastable magnesium sulfide (MgS) with zinc-blende structure have been theoretically studied. The formation of tetrahedral 1Te4Zn cells is thermodynamically favorable in ZnxMg1 − x TeyS1 − y (x ≥ 4y) solid solutions enriched in MgS in the region of dilute Te concentrations. At temperatures selected for the growth (230°C) and annealing (500°C), the free energy of a solid solution in which separate Te atoms must be surrounded only by Zn atoms is lower than that of the solution with a random arrangement of these impurities. This phenomenon is due to a thermodynamic advantage of the formation of Mg-S and Zn-Te bonds over Zn-S and Mg-Te bonding, as well as due to a decrease in the elastic strain energy upon self-assembly of the given isoelectronic impurities.
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Original Russian Text © O.V. Elyukhina, G.S. Sokolovskă, V.I. Kuchinskă, VA. Elyukhin, 2006, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 32, No. 18, pp. 82–87.
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Elyukhina, O.V., Sokolovskiĭ, G.S., Kuchinskiĭ, V.I. et al. Self-assembling of zinc and tellurium impurities in zinc-blende MgS. Tech. Phys. Lett. 32, 818–820 (2006). https://doi.org/10.1134/S1063785006090240
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DOI: https://doi.org/10.1134/S1063785006090240