Dynamic Nuclear Polarization with Single Electron Spins

Abstract

We polarize nuclear spins in a GaAs double quantum dot by controlling two-electron spin states near the anti-crossing of the singlet (S) and m_S=+1 triplet (T+) using pulsed gates. An initialized S state is cyclically brought into resonance with the T+ state, where hyperfine fields drive rapid rotations between S and T+, 'flipping' an electron spin and 'flopping' a nuclear spin. The resulting Overhauser field approaches 80 mT, in agreement with a simple rate-equation model. A self-limiting pulse sequence is developed that allows the steady-state nuclear polarization to be set using a gate voltage.

related papers available at http://marcuslab.harvard.edu

References in corpus (7)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Coherent control of a single electron spin with electric fields
• Hyperfine-mediated gate-driven electron spin resonance
• Large nuclear Overhauser fields detected in vertically-coupled double quantum dots
• Semiclassical dynamics and long time asymptotics of the central-spin problem in a quantum dot
• Quantum Description of Nuclear Spin Cooling in a Quantum Dot
• Quantum versus classical hyperfine-induced dynamics in a quantum dot

Cited by in corpus (10)

• 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
• Measurement of Temporal Correlations of the Overhauser Field in a Double Quantum Dot
• Theory of electric dipole spin resonance in quantum dots: Mean field theory with Gaussian fluctuations and beyond
• Nuclear State Preparation via Landau-Zener-Stueckelberg transitions in Double Quantum Dots
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Wavefunction considerations for the central spin decoherence problem in a nuclear spin bath
• Electrical measurement of a two-electron spin state in a double quantum dot
• Dynamic nuclear polarisation in biased quantum wires with spin-orbit interaction
• Restrictions on modeling spin injection by resistor networks