Electronic and optical properties of quaternary selenides for optoelectronic applications: Insights from DFT+U-computations |
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Authors: | Sikandar Azam Muhammad Imran Amin Ur Rahman Asif Nadeem Riadh Neffati |
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Institution: | 1. Faculty of Engineering and Applied Sciences, Department of Physics, Riphah International University, Islamabad, Pakistan;2. Faculty of Engineering and Applied Sciences, Department of Physics, Riphah International University, Islamabad, Pakistan
Contribution: ?Investigation, Writing - original draft;3. Faculty of Engineering and Applied Sciences, Department of Physics, Riphah International University, Islamabad, Pakistan
Contribution: ?Investigation, Project administration, Visualization;4. Department of Physics, University of Management and Technology, Lahore, Pakistan;5. Departmenet of Physics, King Khalid University, Abha, Saudi Arabia
Laboratoire de Physique de la Matière Condensée, Département de Physique, Faculté des Sciences de Tunis, Université Tunis El Manar, Tunis, Tunisia
Contribution: Writing - review & editing |
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Abstract: | The optical properties, electronic charge density, electronic structure of the new layered selenides materials, BaGdCuSe3, CsUCuSe3, CsZrCuSe3, and CsGdZnSe3 compounds have been calculated by using the full potential and linear augmented plane wave (FP-LAPW) methods as applied in the WIEN2k package, which is based on the density functional theory. The ALnMSe3 compound's structure of these was (A = Cs, Ba; Ln = Zr, Gd, U; M = Cu, Zn) is composed of (n = 1, 2) layers, which might be separated by A atoms. It is to be observed that there is strong hybridization between the s, p, and d states of Zr, Gd, and Cu atoms. Around the gadolinium atom, the charge density contours are completely circular, but the Gadolinium “Gd” atom shows an ionic nature. To calculate the refractive index, we used Kramer's Kronig correlations with the imaginary part dielectric function. The decrease in the refractive index is due to the lack of probability for direct excitation of the electrons, resulting in a loss of energy. The value of the static refractive index for all reference compounds is about 1.75–2.25, which is indication that the material used in optoelectronic devices. |
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Keywords: | Brillouin zone electronic charge density new layered selenides materials optical properties orthorhombic space group |
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