Spin Echo of a Single Electron Spin in a Quantum Dot

Journal article (2008)
Department
Kavli Institute of Nanoscience (AS) (TU Delft)
Copyright: © 2008 The Author(s) ; American Physical Society
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Published Date

10-06-2008

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Source:

Physical Review Letters, 100 (23), 2008

Faculty

Applied Sciences

Department

Kavli Institute of Nanoscience

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 µs 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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