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Journal of Low Temperature Physics

, Volume 150, Issue 5–6, pp 730–738 | Cite as

MAEAM Investigation of Phonons for Alkali Metals

  • Jian-Min Zhang
  • Xiao-Jun Zhang
  • Ke-Wei Xu
Article

Abstract

Within the harmonic approximation, the atomic force constants have been derived and the phonon dispersion curves along three major symmetry directions [00ζ], [0ζ ζ] and [ζ ζ ζ] (or in group-theory notation Δ, Σ, and Λ) have been calculated for five alkali metals Li, Na, K, Rb and Cs by combining the modified analytic embedded atom method (MAEAM) with the theory of lattice dynamics. The results are in agreement with available experimental results for Li, Na and K, which may imply that the predicted phonon dispersion curves for Rb and Cs are correct.

Keywords

Alkali metals Lattice dynamics MAEAM 

PACS

71.20.Dg 63.20.Dj 62.60.+v 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.College of Physics and Information TechnologyShaanxi Normal UniversityXianPeople’s Republic of China
  2. 2.School of ScienceXian Polytechnic UniversityXianPeople’s Republic of China
  3. 3.State Key Laboratory for Mechanical Behavior of MaterialsXian Jiaotong UniversityXianPeople’s Republic of China

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