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Lattice Dynamics of Binary Alloys
Author(s) -
Gurskii Z. A.,
Chushak Ya. G.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221570207
Subject(s) - binary number , statistical physics , lattice (music) , condensed matter physics , short range order , debye , debye model , phase transition , materials science , thermodynamics , physics , mathematics , arithmetic , acoustics
Lattice dynamics of binary alloys is investigated by the collective variables method. The relation between a developing technique and the well‐known virtual crystal and coherent potential approximations is analysed. The characteristic property of the theory presented consists in taking into account explicitly the short‐range order. The influence of pair correlations on the vibrational density of states and the Debye temperature for K–Rb alloys is calculated and discussed. The short‐range‐order effects on the dynamic properties are shown to be strong near the order–disorder phase transition temperature.