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- W2017122904 abstract "We report on positive trion (X+) spin relaxation in self-assembled InAs/GaAs quantum dots. The hyperfine interaction between the electron and nuclear spins acts as a randomly oriented magnetic field for the electron spin, giving rise to ensemble dephasing and thus to partial relaxation in less than 1 ns. Time-resolved photoluminescence polarization measurements carried out on an ensemble of InAs/GaAs quantum dots, charged with excess holes by proximity p-doping, reveal this peculiar dynamics. The fast polarization decrease can be efficiently suppressed by screening the hyperfine interaction with a longitudinal magnetic field of 100 mT. The quenching of this hyperfine-induced relaxation is also evidenced for a single charge-tunable quantum dot in the regime of X+ photoluminescence and excited with modulated polarization to prevent dynamic nuclear polarization. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)" @default.
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- W2017122904 date "2006-12-01" @default.
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- W2017122904 title "Spin relaxation of positive trions in InAs/GaAs quantum dots: the role of hyperfine interaction" @default.
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- W2017122904 doi "https://doi.org/10.1002/pssb.200671528" @default.
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