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Moments of Impurity Absorption Bands in Solids
Author(s) -
Gold A.,
Keil T. H.
Publication year - 1966
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.19660130116
Subject(s) - hamiltonian (control theory) , impurity , quadratic equation , lattice (music) , additive function , chemistry , physics , absorption (acoustics) , molecular physics , condensed matter physics , atomic physics , quantum mechanics , mathematics , mathematical analysis , optics , mathematical optimization , geometry , acoustics
It is shown that the contributions to the first three moments of an optical absorption (or emission) band of a point defect in a solid due to uncoupled lattice modes or perturbations are additive. Deviations from simple additivity may be caused by quadratic or higher cross terms in the interaction Hamiltonian or by deviations from adiabaticity. Difficulties and ambiguities in giving a consistent second‐order treatment for extracting coupling parameters from observed moments are pointed out.