Electrical control of spin relaxation in a quantum dot.

  title={Electrical control of spin relaxation in a quantum dot.},
  author={Sami Amasha and Kenneth Maclean and Iuliana P. Radu and Dominik Max Zumb{\"u}hl and Marc A. Kastner and Mervin P Hanson and Arthur. C. Gossard},
  journal={Physical review letters},
  volume={100 4},
We demonstrate electrical control of the spin relaxation time T1 between Zeeman-split spin states of a single electron in a lateral quantum dot. We find that relaxation is mediated by the spin-orbit interaction, and by manipulating the orbital states of the dot using gate voltages we vary the relaxation rate W identical withT1(-1) by over an order of magnitude. The dependence of W on orbital confinement agrees with theoretical predictions, and from these data we extract the spin-orbit length… CONTINUE READING

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