We report on the first observation of strongly damped phonon-polariton beats and picosecond carrier relaxation dynamics of La0.67Ca0.33MnO3 near the metal-insulator phase transition. The observed 60 GHz coherent oscillations show clear softening as the temperature approaches TC and persist well into the ferromagnetic-metallic state. The characteristic energy and the fast decay component of the transient reflectivity signal near TC is directly related to the Jahn-Teller distortions.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Oct 1 2001|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics