Spin echo of a single electron spin in a quantum dot |
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Authors: | Koppens F H L Nowack K C Vandersypen L M K |
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Affiliation: | Kavli Institute of NanoScience Delft, Delft, The Netherlands. |
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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 micros 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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