Abstract
We have measured the spin-orbit splitting, Zeeman effect, and splitting under and stress of the lowest vibronic levels of the term of in KMg. The results are in good agreement with the Ham theory of the dynamic Jahn-Teller effect, in which interaction is only with a single (tetragonal) distortion mode. The convergence of this theory is checked and found to be good, and the influence of vibrations is shown to be small. We conclude that the cluster model, on which the Ham theory is based, gives an adequate description of the Jahn-Teller effect in perovskite fluorides.
- Received 7 June 1971
DOI:https://doi.org/10.1103/PhysRevB.4.2092
©1971 American Physical Society