Abstract
We examine the consequences for the Mossbauer spectrum of coupling between asymmetric vibrational modes and an electronic state having orbital degeneracy – the Jahn-Teller (JT) effect. Characteristic modifications of the quadrupole coupling by a spontaneous JT distortion (« static JT effect ») and by a dynamic coupling of electronic and vibrational motions (« dynamic JT effect ») are discussed with the aid of a simplified model. The importance of small crystal strains in determining the type of spectrum observed is discussed, as is also the role of thermally induced transitions in causing motional averaging of the spectrum. Examples are given of JT effects as observed or anticipated in the Mossbauer spectrum of Fe2+ in crystal sites with tetrahedral and octahedral coordination.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
