| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Structural and Optical Properties of GaAs0.5Sb0.5 and In0.5Ga0.5As0.5Sb0.5: ab initio Calculations for Pure and Doped Materials |
| Mazin SH. Othman1, Khudheir A. Mishjil2**, Nadir F. Habubi2 |
1Department of General Science, Faculty of Education, Soran University, Soran-Erbil, Iraq
2Department of Physics, College of Education, Al-Mustansiriyah University, Iraq |
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| Cite this article: |
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Mazin SH. Othman, Khudheir A. Mishjil, Nadir F. Habubi 2012 Chin. Phys. Lett. 29 037302 |
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Abstract We perform a first-principles study to evaluate the structural, electronic and optical properties of GaAsxSb1−x ternary and InyGa1−yAsxSb1−x quaternary semiconductor alloys up to x=0.5, y=0.5. We employ the Perdew–Burke–Ernzerhof form of the generalized gradient approximation (GGA) within the framework of density functional theory (DFT) by using a simulation program. Calculations are carried out in different configurations. For these alloys, lattice parameters and optical band gap energy are calculated. The optical band gaps vary with increasing and decreasing As and In concentrations, respectively. The optical conductivity, absorption and the real part of the dielectric function ε1(ω) are discussed. Our results agree well with the theoretical and experimental data available in the literature.
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| Keywords:
73.61.Vc
78.66.-W
78.66.Db
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Received: 12 August 2011
Published: 11 March 2012
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