Spin-echo of a single electron spin in a quantum dot
Mesoscale and Nanoscale Physics
2009-08-17 v1
Abstract
We report a measurement of the spin-echo decay of a single electron spin confined in a semiconductor quantum dot. When we tip the spin in the transverse plane via a magnetic field burst, it dephases in 37 ns due to the Larmor precession around a random effective field from the nuclear spins in the host material. We reverse this dephasing to a large extent via a spin-echo pulse, and find a spin-echo decay time of about 0.5 microseconds at 70 mT. These results are in the range of theoretical predictions of the electron spin coherence time governed by the dynamics of the electron-nuclear system.
Cite
@article{arxiv.0711.0479,
title = {Spin-echo of a single electron spin in a quantum dot},
author = {F. H. L. Koppens and K. C. Nowack and L. M. K. Vandersypen},
journal= {arXiv preprint arXiv:0711.0479},
year = {2009}
}
Comments
5 pages, 4 figures