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      https://www.ias.ac.in/article/fulltext/boms/034/03/0499-0506

    • Keywords

       

      II–VI semiconductor alloys; band structure; charge density; empirical pseudopotential method.

    • Abstract

       

      Electronic band structure calculations are performed for the Be𝑥Zn1−𝑥Te (0 ≤ 𝑥 ≤ 1 in steps of 0.2) alloys following the empirical pseudopotential method. The alloying effects are modelled through the modified virtual crystal approximation. Throughout the composition, valence band maximum resides at the 𝛤 point. The conduction band minimum, however, shifts from 𝛤 to 𝑋 point of symmetry when 𝑥 = 0.27. The observed crossover from direct to indirect bandgap is well in accordance with the experimental observations. Effect of alloying on the density of states is also discussed. The charge density distribution along a few major planes is computed and discussed. The electronic band structure related parameters like bandwidths, bandgaps and ionicity are reported and compared with experimental data wherever available. We also give estimates of cohesive energy and bulk modulus for the alloys.

    • Author Affiliations

       

      C B Swarnkar1 U Paliwal2 N N Patel2 3 K B Joshi2

      1. Department of Physics, S.G.G. Govt. (PG) College, Banswara 327 001, India
      2. Department of Physics, M.L. Sukhadia University, Udaipur 313 001, India
      3. Now at BARC, Mumbai
    • Dates

       
  • Bulletin of Materials Science | News

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