We measure the relaxation rate W≡T1−1 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 T1 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.
@article{arxiv.cond-mat/0607110,
title = {Measurements of the spin relaxation rate at low magnetic fields in a quantum dot},
author = {S. Amasha and K. MacLean and Iuliana Radu and D. M. Zumbuhl and M. A. Kastner and M. P. Hanson and A. C. Gossard},
journal= {arXiv preprint arXiv:cond-mat/0607110},
year = {2009}
}