Abstract
We have studied the photoexcited carrier dynamics in the electron-doped La 2 - x Ce x CuO 4 (LCCO). In general, there is a slowing down of the relaxation as the temperature decreases. However, the quasiparticle lifetime is found to exhibit a quasi-divergence as the temperature approaches T c from below. We have also observed picosecond rise time in the electron-doped LCCO, which is attributed to the Cooper pair breaking dynamics. The experimental results are analyzed by Rothwarf–Taylor model.
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