Author/Authors :
LAKEL, SAID University of LAGHOUAT - Laboratory of physical materials, Algeria , LAKEL, SAID University of Biskra - Laboratory of Metallic and Semiconducting Materials, Algeria , ELHAMRA, FATIMA University of Biskra - Laboratory of Metallic and Semiconducting Materials, Algeria , IBRIR, M. University of Msila - Laboratory of Physics of Materials and its Applications, Algeria , ALMI, K. University of LAGHOUAT - Laboratory of physical materials, Algeria
Title Of Article :
AB-INITIO CALCULATIONS OF THE DIELECTRIC CONSTANT, OPTICAL ABSORPTION AND THE REFRACTIVE INDEX OF ZN_1-X BE_X O ALLOY
Abstract :
The optical properties of Zn1-xBexO were studied by first principle method using the density functional theory. The dielectric function and optical constants are calculated using PP-PW method within the generalized gradient approximation (GGA). The theoretical calculated optical properties yield a static dielectric constant for Zn1-xBexO are 4.08, 3.86, 3.60, 3.12 and 2.85 along polarization direction (001). It indicates that the static dielectric constants reduce with increasing Be concentration. However a static refractive indices for Zn1-xBexO are found to be 2.05, 1.98, 1.88, 1.77 and 1.70 with the increasing x, respectively. The obtained results agree well with the available theoretical and experimental values.
NaturalLanguageKeyword :
Optical Properties , refractive index , PP , PW , DFT
JournalTitle :
Courrier Du Savoir
