Abstract
A Gaussian form G(q) = exp(-BGq 2)suitable for expressing total electronic band structure energy function along with relationship of pair potential in low momentum transfer region of q Ф(q) → Ф(0) G(q) describe very well the liquid phonon dynamics. the correlation between Debye characteristic temperature θD and melting temperature Tm in form of Lindmann melting criteria has been described in a new dimension. the role of various types of phonon frequencies ωp (plasma), ωbs (band structural) and ωth (thermal) has been described. This has been further utilized in determination of velocity of sound Vs . the values of Vs obtained by various methods show close agreement with experimental values and Bchm-Staver values.
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