Phys. Rev. Lett. 102, 146601 (2009) [4 pages]Hole–Nuclear Spin Interaction in Quantum DotsReceived 6 July 2008; published 6 April 2009 We have measured the carrier spin dynamics in p-doped InAs/GaAs quantum dots by pump-probe and time-resolved photoluminescence experiments. We obtained experimental evidence of the hyperfine interaction between hole and nuclear spins. In the absence of an external magnetic field, our calculations based on dipole-dipole coupling between the hole and the quantum dot nuclei lead to a hole-spin dephasing time for an ensemble of dots of 14 ns, in close agreement with experiments. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.146601
DOI:
10.1103/PhysRevLett.102.146601
PACS:
72.25.Fe, 72.25.Rb, 78.47.J−, 78.55.Cr
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