| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Electronic Band Structure and Optical Response of Spinel SnX2O4 (X = Mg, Zn) through Modified Becke–Johnson Potential |
| A. Manzar1, G. Murtaza2**, R. Khenata3,4, S. Muhammad1, Hayatullah1 |
1Department of Physics, Hazara University Mansehra, KPK, Pakistan
2Materials Modeling Lab, Department of Physics, Islamia College University, Peshawar, Pakistan
3LPQ3M Laboratory, Institute of Science and Technology, University of Mascara, Algeria
4Department of Physics and Astronomy, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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| Cite this article: |
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A. Manzar, G. Murtaza, R. Khenata et al 2013 Chin. Phys. Lett. 30 047401 |
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Abstract The modified Becke–Johnson exchange potential approximation is applied to predict the band structure, optical parameters and electron density of SnMg2O4 and SnZn2O4. The local density approximation, generalized gradient approximation (GGA), EV-GGA significantly underestimate the direct band gap values compared to modified Becke–Johnson approximation. The band gap dependent optical parameters such as dielectric constant, index of refraction, reflectivity, and optical conductivity are calculated and analyzed. A prominent feature of cation replacement is observed and analyzed for these studied compounds. The replacement of the cation Mg by Zn leads to a significant reduction in the value of band gap and consequently affects its dependant optical parameters. This variation is of crucial importance for device fabrication in different regions of the spectrum.
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Received: 16 January 2013
Published: 28 April 2013
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| PACS: |
74.20.Pq
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(Electronic structure calculations)
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74.25.Gz
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(Optical properties)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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