Phonon Dispersion of Alkali Metals Using the TB-SMA Model of Cohesion

Aigbekaen E.E., Samuel Okunzuwa, Arthur I. Ejere

Abstract


The determination of Phonon dispersion of alkali metals was unsuccessful using the parameter n=1/2 or 2/3 in the past two decades. In this study the parameter n has been consistently determined for the different alkali metals, the force constant has been determined up to the fourth next nearest neighbour. The result showed that the TB-SMA dispersion curves were in good agreement with experiment. This good agreement with experiment of the TB-SMA Phonons counters the prevailing notion in the literature that the TB-SMA model fails for alkali metals.

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DOI: http://dx.doi.org/10.19044/esj.2019.v15n15p487

DOI (PDF): http://dx.doi.org/10.19044/esj.2019.v15n15p487


European Scientific Journal (ESJ)

 

ISSN: 1857 - 7881 (Print)
ISSN: 1857 - 7431 (Online)

 

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