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Measurements of the spin relaxation rate at low magnetic fields in a quantum dot

S. Amasha·K. MacLean·Iuliana Radu·D. M. Zumbuhl·M. A. Kastner·M. P. Hanson·A. C. Gossard
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Abstract

We measure the relaxation rate $W \equiv T_{1}^{-1}$ of a single electron spin in a quantum dot at magnetic fields from 7 T down to 1.75 T, much lower than previously measured. At 1.75 T we find that $T_{1}$ is 170 ms. We find good agreement between our measurements and theoretical predictions of the relaxation rate caused by the spin-orbit interaction, demonstrating that spin-orbit coupling can account for spin relaxation in quantum dots.

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S. Amasha, K. MacLean, Iuliana Radu, D. M. Zumbuhl, M. A. Kastner, M. P. Hanson, A. C. Gossard. 2006-07-05. Measurements of the spin relaxation rate at low magnetic fields in a quantum dot. https://arxiv.org/abs/cond-mat/0607110

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