Abstract
Ab initio hyperpolarizabilities and are calculated at the self-consistent field level for the ions and in lithium halide crystals. Large reductions with respect to free-ion values are found, and the physical factors contributing to the reduction are discussed. Artifacts arise for a pointcharge model of the crystal but are removed when a more realistic model of the ionic environment is used. The final calculated values are in good agreement with the limited experimental data available from third-harmonic generation and three-wave-mixing experiments.
- Received 11 April 1984
DOI:https://doi.org/10.1103/PhysRevB.30.6131
©1984 American Physical Society