Structural, electronic and optical properties of SrCl 2 under hydrostatic stress

Y. Benmimoun, A. Bouhemadou (), R. Khenata (), A. H. Reshak, B. Amrani, M. Ameri and H. Baltache

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 61, issue 2, 165-171

Abstract: The results of first-principles theoretical study of the structural, electronic and optical properties of SrCl 2 in its cubic structure, have been performed using the full-potential linear augmented plane-wave method plus local orbitals (FP-APW+lo) as implemented in the WIEN2k code. In this approach both the local density approximation (LDA) and the generalized gradient approximation (GGA) are used for the exchange-correlation (XC) potential. Also we have used the Engel-Vosko GGA formalism, which optimizes the corresponding potential for band structure calculations. We performed these calculations with and without spin-orbit interactions. Including spin-orbit coupling cause to lifts the triple degeneracy at Γ point and a double degeneracy at X point. Results are given for structural properties. The pressure dependence of elastic constants and band gaps are investigated. The dielectric function, reflectivity spectra and refractive index are calculated up to 30 eV. Also we calculated the pressure and volume dependence of the static optical dielectric constant. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Keywords: 71.15.Ap Basis sets (LCAO; plane-wave; APW; etc.) and related methodology (scattering methods; ASA; linearized methods; etc.); 78.40.Fy Semiconductors; 78.20.Ci Optical constants (including refractive index; complex dielectric constant; absorption; reflection and transmission coefficients; emissivity) (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1140/epjb/e2008-00064-6

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