Observation of strongly damped GHz phonon-polariton oscillations in La0.67Ca0.33MnO3

Y. H. Ren; X. H. Zhang; G. Lüpke; M. Schneider; M. Onellion; I. E. Perakis; Y. F. Hu; Qi Li

doi:10.1103/PhysRevB.64.144401

Observation of strongly damped GHz phonon-polariton oscillations in La_0.67Ca_0.33MnO₃

Y. H. Ren, X. H. Zhang, G. Lüpke, M. Schneider, M. Onellion, I. E. Perakis, Y. F. Hu, Qi Li

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

We report on the first observation of strongly damped phonon-polariton beats and picosecond carrier relaxation dynamics of La_0.67Ca_0.33MnO₃ near the metal-insulator phase transition. The observed 60 GHz coherent oscillations show clear softening as the temperature approaches T_C and persist well into the ferromagnetic-metallic state. The characteristic energy and the fast decay component of the transient reflectivity signal near T_C is directly related to the Jahn-Teller distortions.

Original language	English (US)
Article number	144401
Pages (from-to)	1444011-1444015
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.64.144401
State	Published - Oct 1 2001

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.64.144401

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abstract = "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.",

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T1 - Observation of strongly damped GHz phonon-polariton oscillations in La0.67Ca0.33MnO3

AU - Ren, Y. H.

AU - Zhang, X. H.

AU - Lüpke, G.

AU - Schneider, M.

AU - Onellion, M.

AU - Perakis, I. E.

AU - Hu, Y. F.

AU - Li, Qi

PY - 2001/10/1

Y1 - 2001/10/1

N2 - 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.

AB - 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.

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Observation of strongly damped GHz phonon-polariton oscillations in La_0.67Ca_0.33MnO₃

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