Premium
Cluster bethe lattice treatment for phonons in pseudobinary alloy systems
Author(s) -
Kleinert P.
Publication year - 1979
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.2220950118
Subject(s) - bethe lattice , alloy , phonon , cluster (spacecraft) , lattice (music) , raman spectroscopy , condensed matter physics , materials science , transversal (combinatorics) , vibrational spectrum , physics , quantum mechanics , mathematics , mathematical analysis , computer science , acoustics , ising model , programming language , composite material
The cluster Bethe lattice method is extended to study vibrational properties of pseudobinary alloy systems AB 1− c C c . As an example, the phonon density of states and the infrared response function of the alloy system In 1− c Ga c P is calculated. The calculations are in agreement with experimental results. In the approach presented here longitudinal modes do not appear and hence there is not any longitudinal–transversal splitting observed in the first order Raman spectrum.