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arXiv · 0807.0968

Hole - Nuclear Spin Interaction in Quantum Dots

B. Eble·C. Testelin·P. Desfonds·F. Bernardot·A. Balocchi·T. Amand·A. Miard·A. Lemaitre·X. Marie·M. Chamarro
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Abstract

We have measured the carrier spin dynamics in p-doped InAs/GaAs quantum dots by pump-probe photo-induced circular dichroism and time-resolved photoluminescence experiments. We show that the hole spin dephasing is controlled by the hyperfine interaction between hole and nuclear spins. In the absence of external magnetic field, we find a characteristic hole spin dephasing time of 15 ns, in close agreement with our calculations based on dipole-dipole coupling between the hole and the quantum dot nuclei. Finally we demonstrate that a small external magnetic field, typically 10 mT instead of 200 mT for the case of electrons, quenches the hyperfine hole spin dephasing.

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B. Eble, C. Testelin, P. Desfonds, F. Bernardot, A. Balocchi, T. Amand, A. Miard, A. Lemaitre, X. Marie, M. Chamarro. 2008-07-22. Hole - Nuclear Spin Interaction in Quantum Dots. https://doi.org/10.1103/physrevlett.102.146601

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