Jahn-Teller phonon anomaly and dynamic phase fluctuations in La0.7Ca0.3MnO3.

Abstract

Inelastic neutron scattering was used to study the temperature (T) dependence of the lattice excitations in La 0.7Ca 0.3MnO (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(C) (240 K). We attribute this anomaly to the growing dynamic phase segregation as T-->T(C), thus providing evidence of local fluctuations associated with the short-range polaron or charge/orbital ordering in the ferromagnetic-metallic state.

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Cite this paper

@article{Zhang2001JahnTellerPA, title={Jahn-Teller phonon anomaly and dynamic phase fluctuations in La0.7Ca0.3MnO3.}, author={Jiandi Zhang and Pengcheng Dai and Jaime A. Fernandez-Baca and E . Ward Plummer and Yoshihisa Tomioka and Yoshiki Tokura}, journal={Physical review letters}, year={2001}, volume={86 17}, pages={3823-6} }