Lattice dynamics of molybdenum and tungsten |
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Authors: | C M I Okoye Satya Pal |
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Institution: | (1) Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria |
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Abstract: | Summary The lattice dynamics of molybdenum and tungsten has been re-examined within the framework of the transition metal model potential
by incorporating the local-field correction to the dynamical matrix for phonon dispersion relation. It is observed that the
local-field correction can be represented by an attractive short-range potential which tends to cancel or ?screen? the Born-Mayer
repulsion. The numerical calculations for molybdenum and tungsten show that the local-field correction plays a significant
role and leads to a better agreement between the theoretically computed phonon dispersion curves and the experimental data. |
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Keywords: | Phonons and vibrations in crystal lattices |
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