Lattice Dynamics of Silicon

Authors

  • Nutan Kumari Department of Physics, L.S. College, Muzaffarpur, Bihar-842001, India
  • Sunil Kumar Mishra Department of Physics, L.S. College, Muzaffarpur, Bihar-842001, India

DOI:

https://doi.org/10.48165/

Keywords:

Extended valence force field (EVFF) model, phonon distribution function, Debye characteristic temperature, phenomenological models

Abstract

A phenomenological lattice dynamical model has been developed for the zinc-blende  and diamond structure crystals. The model developed in the present work is an  extended valence force field (EVFF) model which takes into account the short range  valence force field interaction between bonded atoms and central interaction between  non-bonded atoms. The model also incorporates the long-range coulombic interaction  for zinc-blende crystals which are partially ionic in bonding. EVFF model is applied to  lattice vibration of silicon to obtain the phonon dispersion curves, elastic constants,  bulk modulus, Debye characteristic temperatures and phonon distribution function  for silicon. The theoretical values are compared with the experimental results with  satisfactory agreement.

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Published

2019-06-12

Issue

Vol. 38 No. 1 (2019): Bulletin of Pure and Applied Sciences Physics (Jan-Jul) 2019

Section

Articles

How to Cite

Lattice Dynamics of Silicon . (2019). Bulletin of Pure and Applied Sciences – Physics, 38(1), 13–21. https://doi.org/10.48165/