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Braun PF, Marie X, Lombez L, et al. Direct observation of the electron spin relaxation induced by nuclei in quantum dots. Phys Rev Lett. 2005;94(11):116601doi: 10.1103/PhysRevLett.94.116601.
Braun, P. F., Marie, X., Lombez, L., Urbaszek, B., Amand, T., Renucci, P., Kalevich, V. K., Kavokin, K. V., Krebs, O., Voisin, P., & Masumoto, Y. (2005). Direct observation of the electron spin relaxation induced by nuclei in quantum dots. Physical review letters, 94(11), 116601. https://doi.org/10.1103/PhysRevLett.94.116601
Braun, P-F, et al. "Direct observation of the electron spin relaxation induced by nuclei in quantum dots." Physical review letters vol. 94,11 (2005): 116601. doi: https://doi.org/10.1103/PhysRevLett.94.116601
Braun PF, Marie X, Lombez L, Urbaszek B, Amand T, Renucci P, Kalevich VK, Kavokin KV, Krebs O, Voisin P, Masumoto Y. Direct observation of the electron spin relaxation induced by nuclei in quantum dots. Phys Rev Lett. 2005 Mar 25;94(11):116601. doi: 10.1103/PhysRevLett.94.116601. Epub 2005 Mar 23. PMID: 15903877.
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Phys Rev Lett. 2005 Mar 25;94(11):116601. doi: 10.1103/PhysRevLett.94.116601. Epub 2005 Mar 23.

Direct observation of the electron spin relaxation induced by nuclei in quantum dots.

Physical review letters

P-F Braun, X Marie, L Lombez, B Urbaszek, T Amand, P Renucci, V K Kalevich, K V Kavokin, O Krebs, P Voisin, Y Masumoto

Affiliations

  1. LNMO, INSA 135 Avenue de Rangueil, 31077 Toulouse CEDEX 4, France.

PMID: 15903877 DOI: 10.1103/PhysRevLett.94.116601

Abstract

We have studied the electron spin relaxation in semiconductor InAs/GaAs quantum dots by time-resolved optical spectroscopy. The average spin polarization of the electrons in an ensemble of p-doped quantum dots decays down to 1/3 of its initial value with a characteristic time T(Delta) approximately 500 ps, which is attributed to the hyperfine interaction with randomly oriented nuclear spins. We show that this efficient electron spin relaxation mechanism can be suppressed by an external magnetic field as small as 100 mT.

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