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Multiphonon Structure of Optical Transitions to Impurity Resonance States. The Influence of Anharmonicity
Author(s) -
Suisky D.
Publication year - 1983
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.2221200221
Subject(s) - anharmonicity , impurity , condensed matter physics , lattice (music) , lattice vibration , phonon , resonance (particle physics) , absorption (acoustics) , electron , vibration , atomic physics , attenuation coefficient , chemistry , physics , optics , quantum mechanics , organic chemistry , acoustics
Expressions are derived for the absorption coefficient of substitutional impurities taking into account resonant impurity states and anharmonicity of lattice vibrations. In both the cases the lineshape of the absorption band is modified due to broadening effects. It can be shown that the contribution due to anharmonicity is not only remarkable, but dominates under certain conditions, for example, in the case of strong electron‐phonon interaction.