A new mechanism of electric dipole spin resonance: hyperfine coupling in quantum dots

@article{Laird2009ANM,
  title={A new mechanism of electric dipole spin resonance: hyperfine coupling in quantum dots},
  author={Edward A. Laird and Christian Barthel and Emmanuel I. Rashba and Charles M. Marcus and Micah P. Hanson and Arthur C. Gossard},
  journal={Semiconductor Science and Technology},
  year={2009},
  volume={24},
  pages={064004}
}
A recently discovered mechanism of electric dipole spin resonance, mediated by the hyperfine interaction, is investigated experimentally and theoretically. The effect is studied using a spin-selective transition in a GaAs double quantum dot. The resonant frequency is sensitive to the instantaneous hyperfine effective field, revealing a nuclear polarization created by driving the resonance. A device incorporating a micromagnet exhibits a magnetic field difference between dots, allowing electrons… 

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References

SHOWING 1-10 OF 56 REFERENCES

Hyperfine-mediated gate-driven electron spin resonance.

An all-electrical spin resonance effect in a GaAs few-electron double quantum dot is investigated experimentally and theoretically. The magnetic field dependence and absence of associated Rabi

Electric-dipole-induced spin resonance in quantum dots

An alternating electric field, applied to a quantum dot, couples to the electron spin via the spin-orbit interaction. We analyze different types of spin-orbit coupling known in the literature and

Dynamical spin-electric coupling in a quantum dot

Due to the spin-orbital coupling in an anisotropic semiconductor quantum dot, a freely precessing electron spin produces a time-dependent charge density. This creates a sizable electric field outside

Electrically driven reverse overhauser pumping of nuclear spins in quantum dots.

A new mechanism for polarizing nuclear spins in quantum dots is proposed, based on periodic modulation of the hyperfine coupling by electric driving at the electron spin resonance frequency, which allows polarization in the direction opposite to that expected from the Overhauser effect.

Nuclear-spin-induced oscillatory current in spin-blockaded quantum dots.

We show experimentally that electron transport through GaAs-based double quantum dots can be affected by ambient nuclear spin states in a certain regime where transport is blocked in the absence of

Coherent Control of a Single Electron Spin with Electric Fields

The experimentally realized coherent control of a single-electron spin in a quantum dot using an oscillating electric field generated by a local gate to establish the feasibility of fully electrical manipulation of spin qubits.

Theory of electric dipole spin resonance in quantum dots: Mean field theory with Gaussian fluctuations and beyond

Very recently, the electric dipole spin resonance (EDSR) of single electrons in quantum dots was discovered by three independent experimental groups. Remarkably, these observations revealed three

Electric-field control of a hydrogenic donor's spin in a semiconductor.

Numerical calculations of the spin dynamics of a single hydrogenic donor embedded in GaAs, using a real-space multiband k.p formalism, show the high symmetry of the hydrogenic donors' state results in strongly nonlinear dependences of the electronic g tensor on applied fields.

Measurement of temporal correlations of the overhauser field in a double quantum dot.

The spectral properties of the fluctuating Overhauser field in a GaAs double quantum dot are characterized by measuring correlation functions and power spectra of the rate of singlet-triplet mixing of two separated electrons, indicating that decoherence can be largely suppressed by echo techniques.

Triplet–singlet spin relaxation via nuclei in a double quantum dot

It is shown that electron spin flips are dominated by nuclear interactions and are slowed by several orders of magnitude when a magnetic field of a few millitesla is applied, having significant implications for spin-based information processing.
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