Suppression of nuclear spin diffusion at a GaAs/AlGaAs interface measured with a single quantum dot nano-probe

A. E. Nikolaenko; E. A. Chekhovich; M. N. Makhonin; I. W. Drouzas; A. B. Vankov; J. Skiba-Szymanska; M. S. Skolnick; P. Senellart; A. Lemaitre; A. I. Tartakovskii

doi:10.1103/PhysRevB.79.081303

Suppression of nuclear spin diffusion at a GaAs/AlGaAs interface measured with a single quantum dot nano-probe

Quantum Physics 2011-01-04 v1

Authors: A. E. Nikolaenko , E. A. Chekhovich , M. N. Makhonin , I. W. Drouzas , A. B. Vankov , J. Skiba-Szymanska , M. S. Skolnick , P. Senellart , A. Lemaitre , A. I. Tartakovskii

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Abstract

Nuclear spin polarization dynamics are measured in optically pumped individual GaAs/AlGaAs interface quantum dots by detecting the time-dependence of the Overhauser shift in photoluminescence (PL) spectra. Long nuclear polarization decay times of ~ 1 minute have been found indicating inefficient nuclear spin diffusion from the GaAs dot into the surrounding AlGaAs matrix in externally applied magnetic field. A spin diffusion coefficient two orders lower than that previously found in bulk GaAs is deduced.

Keywords

nuclear spin dynamics spin physics in semiconductors spin polarization and magnetic phenomena

Cite

@article{arxiv.0901.2281,
  title  = {Suppression of nuclear spin diffusion at a GaAs/AlGaAs interface measured with a single quantum dot nano-probe},
  author = {A. E. Nikolaenko and E. A. Chekhovich and M. N. Makhonin and I. W. Drouzas and A. B. Vankov and J. Skiba-Szymanska and M. S. Skolnick and P. Senellart and A. Lemaitre and A. I. Tartakovskii},
  journal= {arXiv preprint arXiv:0901.2281},
  year   = {2011}
}

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5 pages, 3 figures, submitted to Phys Rev B

Suppression of nuclear spin diffusion at a GaAs/AlGaAs interface measured with a single quantum dot nano-probe

Abstract

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