Correlated few-electron states in vertical double-quantum-dot systems

Abstract

The electronic properties of semiconductor, vertical, double quantum dot systems with few electrons are investigated by means of analytic, configuration-interaction, and mean-field methods. The combined effect of a high magnetic field, electrostatic confinement, and inter-dot coupling, induces a new class of few-electron ground states absent in single quantum dots. In particular, the role played by the isospin (or quantum dot index) in determining the appearance of new ground states is analyzed and compared with the role played by the standard spin.

20 pages, Latex, figures upon request. To appear in Phys. Rev. B (January 1995)

References in corpus (6)

• Quantum Ferromagnetism and Phase Transitions in Double-Layer Quantum Hall Systems
• Addition Spectra of Quantum Dots in Strong Magnetic Fields
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Cited by in corpus (49)

• Hilbert space structure of a solid state quantum computer: two-electron states of a double quantum dot artificial molecule
• Electronic correlations in transport through coupled quantum dots
• Full configuration interaction approach to the few-electron problem in artificial atoms
• Spin interactions and switching in vertically tunnel-coupled quantum dots
• Energy levels and magneto-optical transitions in parabolic quantum dots with spin-orbit coupling
• Few-electron eigenstates of concentric double quantum rings
• Dissociation of vertical semiconductor diatomic artificial molecules
• Effects of different geometries on the conductance, shot noise and tunnel magnetoresistance of double quantum dots
• Molecular phases in coupled quantum dots
• Magic Numbers and Optical Absorption Spectrum in Vertically Coupled Quantum Dots in the Fractional Quantum Hall Regime
• Vertically coupled double quantum dots in magnetic fields
• Quantum phases in artificial molecules
• Numerical Tests of the Chiral Luttinger Liquid Theory for Fractional Hall Edges
• Spin-Blockade in Single and Double Quantum Dots in Magnetic Fields: a Correlation Effect
• Multiple quantum phases in artificial double-dot molecules
• Singlet-triplet splitting, correlation and entanglement of two electrons in quantum dot molecules
• Electron spin and charge switching in a coupled quantum dot quantum ring system
• Two electrons in a strongly coupled double quantum dot: from an artificial helium atom to a hydrogen molecule
• The two electron artificial molecule
• Competing mechanisms for singlet-triplet transition in artificial molecules
• Vertically coupled quantum dots in the local spin-density functional theory
• The SU(4) Kondo effect in double quantum dots with ferromagnetic leads
• A vertical diatomic artificial molecule in the intermediate coupling regime in a parallel and perpendicular magnetic field
• Raman signatures of classical and quantum phases in coupled dots: A theoretical prediction
• Few-electron molecular states and their transitions in a single InAs quantum dot molecule
• Canted ground state in artificial molecules at high magnetic fields
• Theory of tunneling spectra for a few-electron bilayer graphene quantum dot
• Real Space Hartree-Fock Configuration Interaction Method For Complex Lateral Quantum Dot Molecules
• Vertically coupled double quantum rings at zero magnetic field
• Charge-localization and isospin-blockade in vertical double quantum dots
• Quantum Hall Ferrimagnetism in lateral quantum dot molecules
• Magnetoplasma excitations of two vertically coupled dots
• Correlated few-particle states in artificial bipolar molecule
• Renormalization approach for quantum-dot structures under strong alternating fields
• Canted phase in double quantum dots
• Density Functional Theory of Multicomponent Quantum Dots
• Electron-hole bilayer quantum dots: Phase diagram and exciton localization
• Dynamical and point symmetry of the Kondo effect in triangular quantum dot
• Theory of a two-level artificial molecule in laterally coupled quantum Hall droplets
• Spin effects in a confined 2DEG: Enhancement of the g-factor, spin-inversion states and their far-infrared absorption
• Quantum dots with two electrons: Singlet-triplet transitions
• Interplay between electron spin and orbital pseudospin in double quantum dots
• Isospin phases of vertically coupled double quantum rings under the influence of perpendicular magnetic fields
• Quantum phases of correlated electrons in artificial molecules under magnetic fields
• Spin transitions induced by a magnetic field in quantum dot molecules
• Isospin Blockade in Transport through Vertical Double Quantum Dots
• Exact diagonalization study of double quantum dots in parallel geometry in zero-bandwidth limit
• Trions Stimulate Electronic Coupling in Colloidal Quantum Dot Molecules
• Quantum Hall droplets in coupled lateral quantum dots