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      https://www.ias.ac.in/article/fulltext/pram/092/01/0005

    • Keywords

       

      Semiconductor; elastic constants; thermal relaxation time; ultrasonic velocities

    • Abstract

       

      The present study discloses the evaluation of second-order elastic constants of wurtzite boron nitride(w-BN) at room temperature and at different pressures using the many-body interaction potential model approach. Orientation- and pressure-dependent ultrasonic velocity, thermal relaxation time and other related thermophysical parameters (Debye temperature, Debye average velocity, specific heat and thermal energy density) are also calculated using the evaluated second-order elastic constants. The orientation-dependent thermal relaxation time of w-BN is predominantly affected by the Debye average velocity and is indirectly governed by second-order elastic constants. Thermal relaxation time of w-BN is found to decrease with pressure. Calculated elastic and ultrasonic properties of w-BN are compared with the properties of other wurtzite structured materials for a complete analysis and characterisation of the material.

    • Author Affiliations

       

      CHANDRESHVAR PRASAD YADAV1 DHARMENDRA KUMAR PANDEY1

      1. Department of Physics, P.P.N. (P.G.) College, Kanpur 208 001, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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