Anharmonic Broadening of Resonant Modes
- 1 January 1968
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 30 (1) , 73-85
- https://doi.org/10.1002/pssb.19680300109
Abstract
In order to describe the strong temperature dependence of the infrared absorption of Cu+ in NaCI a model is investigated in which the Cu+ is coupled to its nearest neighbours by harmonic and cubic anharmonic forces. The problem is solved by means of retarded Green's functions solving a Dyson equation with a mass operator of second order in the cubic anharmonicity. The pure crystal is described by a Debye model because the impurity‐induced absorption takes place in the very far infrared (ωR ≈ 1/10 Debye frequency). By iterating the mass operator a good agreement between theory and experiment is reached.Keywords
This publication has 8 references indexed in Scilit:
- Anharmonic Broadening of Resonant ModesPublished by Springer Nature ,1968
- A new model for lattice dynamics (“breathing shell model”)Solid State Communications, 1966
- Temperature dependence of the far-infrared resonant mode absorption of NaCl : Cu+Physics Letters, 1966
- Paramagnetic Resonance of Platinum Ions in Niobium Doped BaTiO3 Single CrystalPhysica Status Solidi (b), 1963
- Suggested Experiment on Approximate Localized Modes in CrystalsPhysical Review Letters, 1962
- Theory of Anharmonic Effects in CrystalsPublished by Elsevier ,1961
- DOUBLE-TIME GREEN FUNCTIONS IN STATISTICAL PHYSICSSoviet Physics Uspekhi, 1960
- Statistical-Mechanical Theory of Irreversible Processes. I. General Theory and Simple Applications to Magnetic and Conduction ProblemsJournal of the Physics Society Japan, 1957