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

  • Aigbekaen E.E. Department of Physics, College of Natural and Applied Sciences, Igbinedion University Okada, Nigeria
  • Samuel Okunzuwa Department of Physics, College of Natural and Applied Sciences, Igbinedion University Okada, Nigeria
  • Arthur I. Ejere Department of Physics, Faculty of Physical Sciences, University of Benin, Benin City, Nigeria
DOI: https://doi.org/10.19044/esj.2019.v15n15p487

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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Published
2019-05-31
How to Cite
E.E., A., Okunzuwa, S., & Ejere, A. I. (2019). Phonon Dispersion of Alkali Metals Using the TB-SMA Model of Cohesion. European Scientific Journal, ESJ, 15(15), 487. https://doi.org/10.19044/esj.2019.v15n15p487
Issue
Vol 15 No 15 (2019): ESJ May EDITION
Section
Articles