Spin Echo of a Single Electron Spin in a Quantum Dot

F. H. L. Koppens, K. C. Nowack, and L. M. K. Vandersypen
Phys. Rev. Lett. 100, 236802 – Published 10 June 2008

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 0.5μs at 70 mT. These results are in the range of theoretical predictions of the electron spin coherence time governed by the electron-nuclear dynamics.

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  • Received 3 November 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.236802

©2008 American Physical Society

Authors & Affiliations

F. H. L. Koppens, K. C. Nowack, and L. M. K. Vandersypen

  • Kavli Institute of NanoScience Delft, P.O. Box 5046, 2600 GA Delft, The Netherlands

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Issue

Vol. 100, Iss. 23 — 13 June 2008

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