Electrically-Driven Reverse Overhauser Pumping of Nuclear Spins in Quantum Dots

Abstract

We propose a new mechanism for polarizing nuclear spins in quantum dots, based on periodic modulation of the hyperfine coupling by electric driving at the electron spin resonance frequency. Dynamical nuclear polarization results from resonant excitation rather than hyperfine relaxation mediated by a thermal bath, and thus is not subject to Overhauser-like detailed balance constraints. This allows polarization in the direction opposite to that expected from the Overhauser effect. Competition of the electrically-driven and bath assisted mechanisms can give rise to spatial modulation and sign reversal of polarization on a scale smaller than the electron confinement radius in the dot. The relation to reverse Overhauser polarization observed in GaAs quantum dots is discussed.

References in corpus (12)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Electron spin decoherence in quantum dots due to interaction with nuclei
• Control and Detection of Singlet-Triplet Mixing in a Random Nuclear Field
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Nuclear spin induced oscillatory current in spin-blocked quantum dots
• Electron spin evolution induced by interaction with nuclei in a quantum dot
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Hyperfine-mediated gate-driven electron spin resonance
• Optical pumping of quantum dot nuclear spins
• Hyperfine-mediated transitions between a Zeeman split doublet in GaAs quantum dots: The role of the internal field
• Enhancement of electron spin coherence by optical preparation of nuclear spins
• Large nuclear Overhauser fields detected in vertically-coupled double quantum dots

Cited by in corpus (33)

• Enhancing the Coherence of a Spin Qubit by Operating it as a Feedback Loop That Controls its Nuclear Spin Bath
• Confluence of resonant laser excitation and bi-directional quantum dot nuclear spin polarization
• Locking electron spins into magnetic resonance by electron-nuclear feedback
• Nuclear Spins in Nanostructures
• Correlation between microstructure and magnetotransport in organic semiconductor spin valve structures
• Transport through quantum-dot spin valves containing magnetic impurities
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Exchange Control of Nuclear Spin Diffusion in a Double Quantum Dot
• Multiple Nuclear Polarization States in a Double Quantum Dot
• A new mechanism of electric dipole spin resonance: hyperfine coupling in quantum dots
• Electron-nuclear dynamics in a quantum dot under non-unitary electron control
• Electron spin synchronization induced by optical nuclear magnetic resonance feedback
• Spin-polarized currents in double and triple quantum dots driven by ac magnetic fields
• General theory of feedback control of a nuclear spin ensemble in quantum dots
• Theory of Spin Relaxation in Two-Electron Lateral Coupled Quantum Dots
• Fine structure and optical pumping of spins in individual semiconductor quantum dots
• Collective Nuclear Stabilization by Optically Excited Hole in Quantum Dot
• Nuclear Spin Dynamics in Double Quantum Dots: Multi-Stability, Dynamical Polarization, Criticality and Entanglement
• Theory of Spin Relaxation in Two-Electron Lateral Coupled Si/SiGe Quantum Dots
• Suppression of Zeeman gradients by nuclear polarization in double quantum dots
• Simulations of electric-dipole spin resonance for spin-orbit-coupled quantum dots in Overhauser field: fractional resonances and selection rules
• Many-body singlets by dynamic spin polarization
• Nuclear spin squeezing via electric quadrupole interaction
• Narrowing of the Overhauser field distribution by feedback-enhanced dynamic nuclear polarization
• Quantum mechanical treatment of large spin baths
• Line Shapes of Electric Dipole Spin Resonance in Pauli Spin Blockade
• Deterministic preparation of Dicke states of donor nuclear spins in silicon by cooperative pumping
• Temperature-dependent dynamical nuclear polarization bistabilities in double quantum dots in the spin-blockade regime
• Nuclear spin pumping and electron spin susceptibilities
• Spontaneous and resonant lifting of the spin blockade in nanowire quantum dots
• Transport blocking and topological phases using ac magnetic fields
• Hyperfine interaction mediated electric-dipole spin resonance: the role of frequency modulation
• Dynamical nuclear spin polarization in a quantum dot with an electron spin driven by electric dipole spin resonance