Jahn-Teller Phonon Anomaly and Dynamic Phase Fluctuations in La{sub 0.7}Ca{sub 0.3}MnO{sub 3}
Journal Article
·
· Physical Review Letters
Inelastic neutron scattering was used to study the temperature (T) dependence of the lattice excitations in La{sub 0.7}Ca {sub 0.3}MnO {sub 3} . An optical Jahn-Teller phonon exhibits continuous but anomalous damping with increasing temperature in the ferromagnetic-metallic phase and collapses above the Curie temperature T{sub C} (240K). We attribute this anomaly to the growing dynamic phase segregation as T{yields}T{sub C} , thus providing evidence of local fluctuations associated with the short-range polaron or charge/orbital ordering in the ferromagnetic-metallic state.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205765
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 86; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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