Improved Lattice Dynamical Model to Study Phonon Frequencies of Copper in Off-Symmetric Directions
Volume: 2 - Issue: 07 - Date: 01-07-2013
Approved ISSN: 2278-1412
Published Id: IJAECESTU209 | Page No.: 227-231
Author: Priyank Kumar
Co- Author: N. K. Bhatt,P. R. Vyas,A.R.Jani,V. B. Gohel
Abstract:-Our Improved Lattice Dynamical Model based on Generalized Pseudopotential Theory
(GPT) is found to be good working in studying lattice dynamics and lattice mechanical properties
of transition metals, has been used first time for the theoretical investigation of phonon
frequencies of copper in off-symmetric directions. The computed results of phonon frequencies are
found to be in good agreement with experimental results with average deviations 12.07 %, 6.51%
and 4.76% in ν1, ν2, and ν3 respectively as well as are also in fairly agreement with other
theoretical models. Our model having less number of parameters is found to be capable to
reproduce phonon frequencies not only in symmetric but in off-symmetric directions without
inclusion of tensor forces and modification
Key Words:-Lattice Dynamical Model, transition metal, phonon frequency
Area:-Engineering
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