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- W2007284708 abstract "We have carried out an ultrafast time-resolved differential reflectivity study of a ferromagnetic semiconductor InGaMnAs and made a systematic comparison with low-temperature grown and high-temperature grown InGaAs reference films. Very short carrier lifetimes (∼2 ps) were observed in InGaMnAs and the low-temperature grown InGaAs film, but not in the high-temperature grown InGaAs film. We attribute the short lifetimes to carrier trapping by mid-gap states introduced during low-temperature MBE growth. Furthermore, at long times, we observed periodic oscillations in the differential reflectivity signal with period ∼20 ps, which we interpret as coherent acoustic phonons ." @default.
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- W2007284708 date "2003-09-01" @default.
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- W2007284708 title "Ultrafast carrier dynamics in ferromagnetic InGaMnAs" @default.
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- W2007284708 doi "https://doi.org/10.1016/j.spmi.2004.03.059" @default.
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