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Calculation of the Impurity‐Induced Lattice Mode Absorption
Author(s) -
Genzel L.,
Renk K. F.,
Weber R.
Publication year - 1965
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.19650120212
Subject(s) - impurity , lattice (music) , diatomic molecule , force constant , atomic physics , absorption (acoustics) , condensed matter physics , chemistry , molecular physics , physics , optics , quantum mechanics , molecule , acoustics
A discussion is given of impurity‐induced lattice mode absorption occurring in the far infrared. The model used involves a diatomic linear chain with one impurity mass having a defect charge and an altered nearest neighbour force constant. The displacement of the impurity and the absorption of the perturbed lattice can be expressed in closed formulas which are evaluated numerically. For very weakly bound impurity atoms a quasi‐localized resonance behaviour occurs, which has been observed recently [12].