Phonon dynamics of glassy copper alloys

Abstract

The well recognized model potential is used to investigate the phonon properties for five glassy Copper alloys viz. Cu₅₇Zr₄₃, Cu₆₀W₄₀, Cu₃₃Y₆₇, Cu₄₃Ti₅₇ and Cu₆₆Ti₃₄. The thermodynamic and elastic properties are also computed from the elastic limits of the phonon dispersion curves (PDC). Three theoretical approaches given by Hubbard-Beeby (HB), Takeno-Goda (TG) and Bhatia-Singh (BS) are used in the present study to compute the PDC. Five local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru-Utsumi (IU), Farid et al. (F) and Sarkar et al. (S) are employed to see the effect of exchange and correlation in the aforesaid properties.

Keywords

pseudopotential / pair potential / phonon dispersion curves (PDC) / glassy copper alloys

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