• Normal modes of oscillations of lattices

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    • Keywords


      Lattice oscillations

    • Abstract


      Polynomial equations are obtained for the solutions of the vibrational frequencies of a simple cubic, primitive orthorhombic and tetragonal Bravais lattices of finite size with particles connected to their nearest neighbours through both central and non-centrarl forces, but with arbitrary forces connecting the surface atoms to the rigid walls. The exact expressions of the different normal modes of oscillations and the amplitudes of vibration of different particles in various modes are obtained by solving three decoupled partial difference equations.

    • Author Affiliations


      R N Chaudhuri1

      1. Department of Physics, Hindu College, University of Delhi, Delhi - 110007
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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