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Density Matrix Method in the Theory of Optical Spectra of Impurities in Solids
Author(s) -
Peuker K.
Publication year - 1969
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.19690310143
Subject(s) - impurity , anharmonicity , raman spectroscopy , vibration , spectral line , matrix (chemical analysis) , normal mode , molecular physics , spectrum (functional analysis) , mode (computer interface) , radiation , condensed matter physics , molecular vibration , density functional theory , crystal (programming language) , chemistry , physics , optics , quantum mechanics , computer science , programming language , operating system , chromatography
The results of a previous paper describing the vibrational structure in the secondary radiation spectrum of impurities in solids are extended to the general case of finite temperature. The impurity centres are treated as two‐level electronic systems interacting with a localized mode of vibration. The anharmonic interaction of the localized mode with the crystal modes is taken into account. Expressions are derived describing the Raman‐type and luminescence parts of the spectrum. The relation between the integral intensities of these spectral components are examined as a function of the frequency of the incident light.