Premium
Effect of Concentration on Light Absorption and Dispersion by Impurity Centres in the Case of Weak Electron–Phonon Coupling (II)
Author(s) -
Lubchenko A. F.,
Dudkin S. I.
Publication year - 1967
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.19670200203
Subject(s) - impurity , dispersion (optics) , phonon , electron , condensed matter physics , absorption (acoustics) , coupling (piping) , materials science , attenuation coefficient , molecular physics , chemistry , optics , physics , quantum mechanics , metallurgy , organic chemistry , composite material
The two‐particle Green's function method is used to investigate the dependence of light absorption and dispersion due to substitutional impurity centres upon their concentration in the case of weak electron‐phonon coupling, taking into account the change of the quasi‐elastic constants due to the substitution. At low impurity concentrations the half‐width of the zero‐phonon line and the corresponding dispersion curve as well as their position in the spectrum are shown to vary linearly with concentration; at higher concentration the absorption coefficient may deviate from linearity.