Journal
OPTICS COMMUNICATIONS
Volume 266, Issue 2, Pages 562-564Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2006.05.018
Keywords
chalcogenides; optical properties; dielectric constant; FP-LAPW; DFT; spin-orbit coupling
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We have applied Engel-Vosko exchange energy within density functional theory, to calculate the electronic structure and the optical properties of BaX (X = Te, Se, and S) compounds via full potential linearized augmented plane wave method. We have found that this improves the band gap results comparing to our previous work in which we had made use of Perdew et al. exchange energy functional. We have also calculated the dielectric constant of these compounds, using both Perdew et al. and Engel-Vosko schemes. It is shown that Engel-Vosko exchange energy functional leads to a better result. We have also reported the effect of spin-orbit coupling on the results. (c) 2006 Elsevier B.V. All rights reserved.
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