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*Ab Initio* Study of Structural and Electronic Properties of Barium Chalcogenide Alloys

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First-principles calculations have been used to study the structural and electronic properties of BaS

_{1–x}Se_{x}ternary alloy using full-potential muffin-tin orbital’s (FP-LMTO) method within density functional theory (DFT). In this approach, the local-density approximation (LDA) and generalized gradient approximation (GGA) are used for the exchange-correlation (XC) potential. The effect of composition on lattice parameter, bulk modulus, band gap and effective mass was investigated. The deviations of the lattice constant from Vegard’s law and the bulk modulus from linear concentration depend- ence were observed for BaS_{1–x}Se_{x}alloy. The microscopic origins of bowing parameter were explained using approach of Zunger and co-workers. Accordance is found from the comparison of our results with other experimental and theo- retical calculations.Conflicts of Interest

The authors declare no conflicts of interest.

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M. Ameri, A. Touia, H. Khachai, Z. Mahdjoub, M. Chekroun and A. Slamani, "

*Ab Initio*Study of Structural and Electronic Properties of Barium Chalcogenide Alloys,"*Materials Sciences and Applications*, Vol. 3 No. 9, 2012, pp. 612-618. doi: 10.4236/msa.2012.39088.

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