Spin-echo of a single electron spin in a quantum dot

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.

5 pages, 4 figures

References in corpus (6)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Stimulated and spontaneous optical generation of electron spin coherence in charged GaAs quantum dots
• Universal phase shift and non-exponential decay of driven single-spin oscillations
• Universal Scaling of Hyperfine-Induced Electron Spin Echo Decay

Cited by in corpus (5)

• Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear Spin Bath
• Pure quantum dephasing of a solid state electron spin qubit in a large nuclear spin bath coupled by long-range hyperfine-mediated interactions
• Nuclear Spins in Nanostructures
• Spin interactions, relaxation and decoherence in quantum dots
• Stationary and transient leakage current in the Pauli spin blockade