• Anharmonic force constants of GaSb from the measured third order elastic constants at 300°K

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      https://www.ias.ac.in/article/fulltext/pram/008/05/0402-0407

    • Keywords

       

      Third-order elastic constants; GaSb; ultrasonic pulse interferometer; anharmonic force constants

    • Abstract

       

      The third-order elastic constants of single crystal GaSb are determined using ultrasonic pulse interferometer at 10 MHz. The constants at 300°K, in units of 1011 N.m.−2, are Cl11 = ™ 4 ·75 ± 0·06 C144 = + 0·50 ± 0·25 C113 = ™ 3 ·08 ± 0·02 C166 = ™ 2·16 ± 0·13 C123 = ™ 0 ·44 ± 0·29 C456 = ™ 0·25 ± 0·15 These constants are used to evaluate the three anharmonic first and second neighbour force constants based on modified Keating’s model. The constants are (in units of 1011 N.m−2)γ=− 2·406;δ=0·407;ε=−0·222.

    • Author Affiliations

       

      V Sundara Raja1 2 P Jayarama Reddy1

      1. Physics Department, Sri Venkateswara University, Tirupati - 517502
      2. Department of Physics, S.V. Agricultural College, Tirupati
    • Dates

       
  • Pramana – Journal of Physics | News

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