Theoretical study of nuclear spin polarization and depolarization in self-assembled quantum dots

Abstract

We investigate how the strain-induced nuclear quadrupole interaction influences the degree of nuclear spin polarization in self-assembled quantum dots. Our calculation shows that the achievable nuclear spin polarization in In_{x}Ga_{1-x}As quantum dots is related to the concentration of indium and the resulting strain distribution in the dots. The interplay between the nuclear quadrupole interaction and Zeeman splitting leads to interesting features in the magnetic field dependence of the nuclear spin polarization. Our results are in qualitative agreement with measured nuclear spin polarization by various experimental groups.

14 pages, 13 figures, submitted to Physical Review B

References in corpus (11)

• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear Spin Bath
• Dynamic Nuclear Polarization with Single Electron Spins
• Dynamics of Quantum Dot Nuclear Spin Polarization Controlled by a Single Electron
• Large nuclear Overhauser fields detected in vertically-coupled double quantum dots
• Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots
• Stabilizing effect of nuclear quadrupole interaction on the polarization of electron-nuclear spin system in a quantum dot
• Efficient dynamical nuclear polarization in quantum dots: Temperature dependence
• Light-induced nuclear quadrupolar relaxation in semiconductors
• Determining the electronic triplet-singlet transition probability in double quantum dots: Analogy with the double slit experiment

Cited by in corpus (22)

• Nuclear spin physics in quantum dots: an optical investigation
• Quantum Interface of an Electron and a Nuclear Ensemble
• Dynamic nuclear spin polarization in resonant laser spectroscopy of a quantum dot
• Role of Nuclear Quadrupole Coupling on Decoherence and Relaxation of Central Spins in Quantum Dots
• Quadrupolar spectra of nuclear spins in strained InGaAs quantum dots
• Spin Relaxation due to Charge Noise
• Hyperfine interaction dominated dynamics of nuclear spins in self-assembled quantum dots
• Enhanced Electron Spin Coherence in a GaAs Quantum Emitter
• General theory of feedback control of a nuclear spin ensemble in quantum dots
• Nuclear magnetic resonance inverse spectra of InGaAs quantum dots: Atomistic level structural information
• Non-local nuclear spin quieting in quantum dot molecules: Optically-induced extended two-electron spin coherence time
• Dynamics of Overhauser Field under nuclear spin diffusion in a quantum dot
• Voltage control of electron-nuclear spin correlation time in a single quantum dot
• Investigation of in-plane nuclear field formation in single self-assembled quantum dots
• Nuclear spin polarization in a single quantum dot pumped by two laser beams
• Driven dynamics of a quantum dot electron spin coupled to bath of higher-spin nuclei
• Repeated measurements and nuclear spin polarization
• Measurement-induced nuclear spin polarization
• Phonon-assisted carrier tunneling in coupled quantum dot systems with hyperfine-induced spin flip
• Direct high resolution resonant Raman scattering measurements of InAs quantum dot dynamic nuclear spin polarization states
• Quantifying electron-nuclear spin entanglement dynamics in central-spin systems using one-tangles
• Dynamical nuclear spin polarization in a quantum dot with an electron spin driven by electric dipole spin resonance