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      https://www.ias.ac.in/article/fulltext/boms/037/01/0133-0140

    • Keywords

       

      Pseudo spin–phonon interaction; anharmonic interactions; Green's function.

    • Abstract

       

      A mathematical study about deuterated triglycine sulphate (CD2CD2COOD)3D2SO4 crystal by a theoretical model which is extended with two sublattice pseudospin lattice coupled mode model by adding third, fourth and fifth order phonon anharmonic interaction terms as well as external electric field term in the crystal Hamiltonian. Double-time temperature dependent Green's function is used to derive soft mode frequency, dielectric permittivity, microwave absorption, quality factor, acoustic attenuation, electric conductivity, smooth function, relaxation time, ratio of figure of merits and respective applications in modern technologies. All theoretical results have a good agreement with experimental data.

    • Author Affiliations

       

      Ashish Nautiyal1 Trilok Chandra Upadhyay1

      1. Physics Department, H N B Garhwal University, Srinagar (Garhwal) 246 174, India
    • Dates

       
  • Bulletin of Materials Science | News

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