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    • Investigation of phonon anomalies in intermediate valence compounds SmS and Sm0·65Y0·25S

      Prafulla Kumar Jha Sankar P Sanyal

      Volume 43 Issue 3 September 1994 pp 193-199

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/043/03/0193-0199

    • Keywords

       

      Phonons; phonon dispersion curves; dynamical matrix; density of states

    • Abstract

       

      Phonon anomalies in two intermediate valence compounds (IVC), SmS and Sm0·75Y0·25S have been investigated using breathing shell model (BSM). The BSM includes breathing motion of electron shells of the rare earth atom due tof−d hybridization. The phonon dispersion curves of IVC, calculated from the present model, agree well with the measured data. One-phonon density of states calculated from the present model compares well with the Raman spectra.

    • Author Affiliations

       

      Prafulla Kumar Jha1 Sankar P Sanyal1

      1. Department of Physics, Barkatullah University, C V Raman Building, Bhopal - 462 026, India

    • Dates

       
      Published
      September 1994
      Manuscript received
      2 April 1994
      Manuscript revised
      4 July 1994

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