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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/039/06/1581-1591

    • Keywords

       

      Bi-alkali antimondies; elastic constants; electronic band structure; optical properties.

    • Abstract

       

      The structural parameters, elastic constants, electronic and optical properties of the bi-alkali antimonides (Na$_2$KSb, Na$_2$RbSb, Na$_2$CsSb, K$_2$RbSb, K$_2$CsSb and Rb$_2$CsSb) were calculated using state-of-the-art density functional theory. Different exchange-correlation potentials were adopted to predict the physical properties of these compounds. The calculated structural parameters are found in good agreement with the available experimental and theoretical results. All the compounds are mechanically stable. The compounds Na$_2$KSb, K$_2$RbSb, K$_2$CsSb and Rb$_2$CsSb have direct bandgaps, in which chemical bonding among the cations and anions is mainly ionic. Furthermore, the optical properties of these compounds are described in detail in terms of the dielectric function, refractive index, reflectivity, optical conductivity and absorption coefficient.

    • Author Affiliations

       

      G MURTAZA1 MAZHAR ULLAH1 NAEEM ULLAH2 MALIKA RANI3 M MUZAMMIL1 R KHENATA4 SHAHID M RAMAY5 UMAIR KHAN6

      1. Materials Modeling Laboratory, Department of Physics, Islamia College University, Peshawar 25000, Pakistan
      2. Department of Physics, G. D. C. Darra Adam Khel, F. R. Kohat, KPK 26000, Pakistan
      3. Department of Physics, The Women University Multan, Multan 60000, Pakistan
      4. LPQ3M Laboratory, Faculty of Science and Technology, University of Mascara, Mascara 29000, Algeria
      5. Physics and Astronomy Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
      6. Department of Physics, Hazara University, Mansehra, KPK 21300, Pakistan

    • Dates

       
      Published
      15 October 2016
      Manuscript received
      7 September 2015
      Accepted
      11 April 2016

  • Bulletin of Materials Science | News

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