The Nuclear Spin Nanomagnet

Abstract

Linearly polarized light tuned slightly below the optical transition of the negatively charged exciton (trion) in a single quantum dot causes the spontaneous nuclear spin polarization (self-polarization) at a level close to 100%. The effective magnetic field of spin-polarized nuclei brings the optical transition energy into resonance with photon energy. The resonantly enhanced Overhauser effect sustains the stability of the nuclear self-polarization even in the absence of spin polarization of the quantum dot electron. As a result the optically selected single quantum dot represents a tiny magnet with the ferromagnetic ordering of nuclear spins - the nuclear spin nanomagnet.

19 pages, including 3 figures. Short version has been accepted for publication in Physical Review Letters

References in corpus (7)

• Optical pumping of electronic and nuclear spin in single charge-tunable quantum dots
• Optical pumping of quantum dot nuclear spins
• Polarized fine structure in the excitation spectrum of a negatively charged quantum dot
• Nuclear Spin Switch in Semiconductor Quantum Dots
• Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots
• Nonlinear dynamics of quantum dot nuclear spins
• Self-Polarization and Dynamical Cooling of Nuclear Spins in Double Quantum Dots

Cited by in corpus (14)

• Nuclear spin physics in quantum dots: an optical investigation
• Pumping of nuclear spins by the optical solid effect in a quantum dot
• Control of the direction and rate of nuclear spin flips in InAs quantum dots using detuned optical pulse trains
• Multiple Nuclear Polarization States in a Double Quantum Dot
• Fine structure and optical pumping of spins in individual semiconductor quantum dots
• Dynamic nuclear polarization in InGaAs/GaAs and GaAs/AlGaAs quantum dots under non-resonant ultra-low power optical excitation
• Multitudes of Stable States in a Periodically Driven Electron-Nuclear Spin System in a Quantum Dot
• Many-body singlets by dynamic spin polarization
• Controlling the nuclear polarization in quantum dots using optical pulses with a modest bandwidth
• Dynamics of nuclear spin polarization induced and detected by coherently precessing electron spins in fluorine-doped ZnSe
• Unveiling the electron-nuclear spin dynamics in an n-doped InGaAs epilayer by spin noise spectroscopy
• A solvable quantum model of dynamic nuclear polarization in quantum dots
• Nuclear spin polarization in a single quantum dot pumped by two laser beams
• Optical Spin Initialization and Non-Destructive Measurement in a Quantum Dot Molecule