Abstract
The results of a Raman scattering study of single-crystal are presented and discussed. These results are compared with spectra from the isostructural compounds M (M=La, Ce, Th), within the temperature range 3≤T≤350 K. Ten phonons are observed in , displaying symmetries 2+4+4, consistent with predictions using the space- and site-group symmetries previously determined for this compound [space group (Fm3c)]. In addition, electronic scattering is evident in our spectra, exhibiting the symmetry of the purely antisymmetric representation, . Evidence suggests that this scattering results from localized excitations of the 5f electrons. Various interpretations of this scattering are discussed.
- Received 29 August 1986
DOI:https://doi.org/10.1103/PhysRevB.35.2615
©1987 American Physical Society