Observation of strongly damped GHz phonon-polariton oscillations in La0.67Ca0.33MnO3 - art. no. 144401

Authors
Ren, YH Zhang, XH Lupke, G Schneider, M Onellion, M Perakis, IE Hu, YF Li, Q
Citation
Yh. Ren et al., Observation of strongly damped GHz phonon-polariton oscillations in La0.67Ca0.33MnO3 - art. no. 144401, PHYS REV B, 6414(14), 2001, pp. 4401
Citations number
44
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6414
Issue
14
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011001)6414:14<4401:OOSDGP>2.0.ZU;2-U
Abstract
We report on the first observation of strongly damped phonon-polariton beat s and picosecond carrier relaxation dynamics of La0.67Ca0.33MnO3 near the m etal-insulator phase transition. The observed 60 GHz coherent oscillations show clear softening as the temperature approaches T-C and persist well int o the ferromagnetic-metallic state. The characteristic energy and the fast decay component of the transient reflectivity signal near T-C is directly r elated to the Jahn-Teller distortions.