Structural Phase Transitions Induced by a Pseudo-Jahn-Teller Effect
- 15 January 1973
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 7 (2) , 894-897
- https://doi.org/10.1103/physrevb.7.894
Abstract
A theory is presented for the structural phase transitions occurring in crystals in which the ionic constituents are pseudo-Jahn-Teller ions with nearly twofold electronic degeneracy. We consider the case of a strong Jahn-Teller coupling and study the dynamic properties by means of a time-dependent density matrix which takes into account the correlation between the electronic and vibrational motions of a single ion. The results are compared with those obtained in a recent theory of Pytte and Stevens, in which single-ion terms are treated in a decoupling approximation.Keywords
This publication has 2 references indexed in Scilit:
- Raman scattering and theoretical studies of Jahn—Teller induced phase transitions in some rare-earth compoundsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1972
- Tunneling Model of Phase Changes in Tetragonal Rare-Earth CrystalsPhysical Review Letters, 1971