Nonlinear dynamics of quantum dot nuclear spins

Abstract

We report manifestly nonlinear dependence of quantum dot nuclear spin polarization on applied magnetic fields. Resonant absorption and emission of circularly polarized radiation pumps the resident quantum dot electron spin, which in turn leads to nuclear spin polarization due to hyperfine interaction. We observe that the resulting Overhauser field exhibits hysteresis as a function of the external magnetic field. This hysteresis is a consequence of the feedback of the Overhauser field on the nuclear spin cooling rate. A semi-classical model describing the coupled nuclear and electron spin dynamics successfully explains the observed hysteresis but leaves open questions for the low field behaviour of the nuclear spin polarization.

7 pages, 4 figures

References in corpus (1)

• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics

Cited by in corpus (16)

• Nuclear Spins in Nanostructures
• Dynamics of Quantum Dot Nuclear Spin Polarization Controlled by a Single Electron
• Suppression of spin relaxation in an InAs nanowire double quantum dot
• Demagnetization of Quantum Dot Nuclear Spins: Breakdown of the Nuclear Spin Temperature Approach
• Quantum Description of Nuclear Spin Cooling in a Quantum Dot
• Efficient dynamical nuclear polarization in quantum dots: Temperature dependence
• Optically monitored nuclear spin dynamics in individual GaAs quantum dots grown by droplet epitaxy
• Hysteretic response of electron-nuclear spin system in single InAlAs quantum dots:Excitation power and polarization dependences
• Nonequilibrium nuclear-electron spin dynamics in semiconductor quantum dots
• Hyperfine interaction in InAs/GaAs self-assembled quantum dots : dynamical nuclear polarization versus spin relaxation
• Fine structure and optical pumping of spins in individual semiconductor quantum dots
• Precise measurements of electron and hole g-factors of single quantum dots by using nuclear field
• The Nuclear Spin Nanomagnet
• Signature of the Overhauser field on the coherent spin dynamics of donor-bound electron in a single CdTe quantum well
• Bistability of optically-induced nuclear spin orientation in quantum dots
• Optical Spin Initialization and Non-Destructive Measurement in a Quantum Dot Molecule