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Pis'ma v Zh. Èksper. Teoret. Fiz., 2014, Volume 99, Issue 1, Pages 30–34 (Mi jetpl3630)  

CONDENSED MATTER

Ultrafast optical probes of dynamic behavior in La$_{0.7}$Sr$_{0.3}$MnO$_3$/YBa$_2$Cu$_3$O$_{7-\delta}$/La$_{0.7}$Sr$_{0.3}$MnO$_3$ heterostructure

L. Penga, Ch. Caib, D. H. Xua, Y. Liua

a Department of Physics, Shanghai University of Electric Power
b Shanghai University

Abstract: Ultrafast pump-optical probe spectroscopy was used to analyze carriers dynamics behavior in La$_{0.7}$Sr$_{0.3}$MnO$_3$/YBa$_2$Cu$_3$O$_{7-\delta}$/La$_{0.7}$Sr$_{0.3}$MnO$_3$ heterostructure. Our results show the pump signal $\Delta R/R$ for higher laser power (such as $21$ and $41$ mW), below $T_c$, first goes positive, then crosses zero and goes negative, before relaxing back to equilibrium over a time scale of a few ten picoseconds. We extract the characteristic relaxation time of the different process by fitting the data at these powers with a three-exponential decay. For higher laser power, the long characteristic relaxation time are obtained, which implies the competition between FM order and SC order in the La$_{0.7}$Sr$_{0.3}$MnO$_3$/YBa$_2$Cu$_3$O$_{7-\delta}$/La$_{0.7}$Sr$_{0.3}$MnO$_3$ heterostructure.

DOI: https://doi.org/10.7868/S0370274X14010068

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English version:
Journal of Experimental and Theoretical Physics Letters, 2014, 99:1, 27–31

Bibliographic databases:

Document Type: Article
Received: 28.10.2013
Revised: 09.12.2013
Language: English

Citation: L. Peng, Ch. Cai, D. H. Xu, Y. Liu, “Ultrafast optical probes of dynamic behavior in La$_{0.7}$Sr$_{0.3}$MnO$_3$/YBa$_2$Cu$_3$O$_{7-\delta}$/La$_{0.7}$Sr$_{0.3}$MnO$_3$ heterostructure”, Pis'ma v Zh. Èksper. Teoret. Fiz., 99:1 (2014), 30–34; JETP Letters, 99:1 (2014), 27–31

Citation in format AMSBIB
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La$_{0.7}$Sr$_{0.3}$MnO$_3$/YBa$_2$Cu$_3$O$_{7-\delta}$/La$_{0.7}$Sr$_{0.3}$MnO$_3$ heterostructure
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