Signatures of spin pairing in a quantum dot in the Coulomb blockade regime

Abstract

Coulomb blockade resonances are measured in a GaAs quantum dot in which both shape deformations and interactions are small. The parametric evolution of the Coulomb blockade peaks shows a pronounced pair correlation in both position and amplitude, which is interpreted as spin pairing. As a consequence, the nearest-neighbor distribution of peak spacings can be well approximated by a smeared bimodal Wigner surmise, provided that interactions which go beyond the constant interaction model are taken into account.

5 pages, 3 figures

References in corpus (3)

• Interactions and Interference in Quantum Dots: Kinks in Coulomb Blockade Peak Positions
• In-plane gate single-electron transistor in Ga[Al]As fabricated by scanning probe lithography
• Addition Spectra of Chaotic Quantum Dots: Interplay between Interactions and Geometry

Cited by in corpus (49)

• The Statistical Theory of Quantum Dots
• Energy spectra of quantum rings
• Tunable Graphene Single Electron Transistor
• Detection of Single Spin Decoherence in a Quantum Dot via Charge Currents
• Electron counting in quantum dots
• Spin States in Graphene Quantum Dots
• Single Spin Dynamics and Decoherence in a Quantum Dot via Charge Transport
• Spatially resolved manipulation of single electrons in quantum dots using a scanned probe
• Measurement of discrete energy-level spectra in individual chemically-synthesized gold nanoparticles
• Phase coherence in the inelastic cotunneling regime
• Electron Spins in Artificial Atoms and Molecules for Quantum Computing
• Measuring the degeneracy of discrete energy levels using a GaAs/AlGaAs quantum dot
• Observation of "Partial Coherence" in an Aharonov-Bohm Interferometer with a Quantum Dot
• Many-Body Physics and Quantum Chaos
• Interactions in Chaotic Nanoparticles: Fluctuations in Coulomb Blockade Peak Spacings
• Singlet-Triplet Transition Tuned by Asymmetric Gate Voltages in a Quantum Ring
• Spin and Conductance-Peak-Spacing Distributions in Large Quantum Dots: A Density Functional Theory Study
• Spin and e-e interactions in quantum dots: Leading order corrections to universality and temperature effects
• Interactions and Disorder in Quantum Dots: Instabilities and Phase Transitions
• Multi-terminal transport through a quantum dot in the Coulomb blockade regime
• Coulomb Blockade Peak Spacing Distribution: The Interplay of Temperature and Spin
• Ground-state energy and spin in disordered quantum dots
• Spin-orbit interaction in quantum dots in the presence of exchange correlations
• Quantum Dots with Disorder and Interactions: A Solvable Large-g Limit
• Disordered mesoscopic systems with interactions: induced two-body ensembles and the Hartree-Fock approach
• Size scaling of the addition spectra in silicon quantum dots
• A Solvable Regime of Disorder and Interactions in Ballistic Nanostructures, Part I: Consequences for Coulomb Blockade
• Linear conductance in Coulomb-blockade quantum dots in the presence of interactions and spin
• Spin and interaction effects in quantum dots: a Hartree-Fock-Koopmans approach
• Fluctuations of g-factors in metal nanoparticles: Effects of electron-electron interaction and spin-orbit scattering
• Electron-Electron Interactions in Isolated and Realistic Quantum Dots: A Density Functional Theory Study
• Landau Fermi Liquid Picture of Spin Density Functional Theory: Strutinsky Approach to Quantum Dots
• Energy-dependent correlations in the $S$-matrix of chaotic systems
• Spin Effects in a Quantum Ring
• Interaction Matrix Element Fluctuations in Ballistic Quantum Dots: Random Wave Model
• Spin splitting in open quantum dots
• Interaction Effects in the Mesoscopic Regime: A Quantum Monte Carlo Study of Irregular Quantum Dots
• Scar Intensity Statistics in the Position Representation
• Semiclassical theory of non-local statistical measures: residual Coulomb interactions
• de Broglie-Bohm analysis of a nonlinear membrane: From quantum to classical chaos
• Level Spacings in Random Matrix Theory and Coulomb Blockade Peaks in Quantum Dots
• Scrambling and Gate Effects in Realistic Quantum Dots
• p-shell hybridization and Hund's-rule mitigation: Engineering Hilbert spaces in artificial atoms
• Ballistic Quantum Dots with Disorder and Interactions: A numerical study on the Robnik-Berry billiard
• Magnetic forces and stationary electron flow in three-terminal semiconductor quantum ring
• Spin pairs in a weakly coupled many-electron quantum dot
• Co-tunneling current through the two-level quantum dot coupled to magnetic leads: A role of exchange interaction
• A widely tunable few electron droplet
• Interaction Matrix Element Fluctuations in Ballistic Quantum Dots: Dynamical Effects