Cotunneling Spectroscopy in Few-Electron Quantum Dots

Abstract

Few-electron quantum dots are investigated in the regime of strong tunneling to the leads. Inelastic cotunneling is used to measure the two-electron singlet-triplet splitting above and below a magnetic field driven singlet-triplet transition. Evidence for a non-equilibrium two-electron singlet-triplet Kondo effect is presented. Cotunneling allows orbital correlations and parameters characterizing entanglement of the two-electron singlet ground state to be extracted from dc transport.

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References in corpus (32)

• Quantum Computation with Quantum Dots
• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Single-shot read-out of an individual electron spin in a quantum dot
• Coupled quantum dots as quantum gates
• Kondo physics in carbon nanotubes
• Quantum Effects in Coulomb Blockade
• Kondo effect in an integer-spin quantum dot
• Phonon-induced decay of the electron spin in quantum dots
• Excitation Spectra of Circular Few-Electron Quantum Dots
• Zeeman energy and spin relaxation in a one-electron quantum dot
• Allowed and forbidden transitions in artificial hydrogen and helium atoms
• Electron Cotunneling in a Semiconductor Quantum Dot
• Double-Occupancy Errors, Adiabaticity, and Entanglement of Spin-Qubits in Quantum Dots
• Direct Coulomb and Exchange Interaction in Artificial Atoms
• Two-stage Kondo effect in a quantum dot at high magnetic field
• Quantum Phase Transition in a Multi-Level Dot
• Measurements of Kondo and spin splitting in single-electron transistors
• Enhancement of Kondo effect in quantum dots with an even number of electrons
• Transport through a double quantum dot in the sequential- and co- tunneling regimes
• Spin and Polarized Current from Coulomb Blockaded Quantum Dots
• Voltage-tunable singlet-triplet transition in lateral quantum dots
• Conduction through a quantum dot near a singlet-triplet transition
• Excited-state spectroscopy on a nearly-closed quantum dot via charge detection
• Singlet-triplet transition in a single-electron transistor at zero magnetic field
• Kondo effect induced by a magnetic field
• Singlet-triplet transition in a lateral quantum dot
• Spin fractionalization of an even number of electrons in a Quantum dot
• Mean Field Theory of the Kondo Effect in Quantum Dots with an Even Number of Electrons
• Singlet-Triplet Transition Tuned by Asymmetric Gate Voltages in a Quantum Ring
• Flux-quantum-modulated Kondo conductance in a multielectron quantum dot
• Kondo effect and singlet-triplet splitting in coupled quantum dots in a magnetic field

Cited by in corpus (101)

• Spins in few-electron quantum dots
• Semiconductor Spin Qubits
• Direct Observation of Second Order Atom Tunnelling
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• Strongly Correlated Two-Photon Transport in One-Dimensional Waveguide Coupled to A Two-Level System
• Direct Measurement of the Spin-Orbit Interaction in a Two-Electron InAs Nanowire Quantum Dot
• A coherent beam splitter for electronic spin states
• Singlet-triplet spin blockade and charge sensing in a few-electron double quantum dot
• Symmetry breaking and quantum correlations in finite systems: Studies of quantum dots and ultracold Bose gases and related nuclear and chemical methods
• Recipes for spin-based quantum computing
• Crossover from mesoscopic to universal phase for electron transmission in quantum dots
• Nonequilibrium Singlet-Triplet Kondo Effect in Carbon Nanotubes
• Tunnel magnetoresistance of quantum dots coupled to ferromagnetic leads in the sequential and cotunneling regimes
• SU(4) and SU(2) Kondo Effects in Carbon Nanotube Quantum Dots
• Excitation spectrum of two correlated electrons in a lateral quantum dot with negligible Zeeman splitting
• Effects of symmetry breaking in finite quantum systems
• Evolution of SU(4) Transport Regimes in Carbon Nanotube Quantum Dots
• Singlet-triplet splitting in double quantum dots due to spin orbit and hyperfine interactions
• Spin effects in single electron tunneling
• Spin relaxation at the singlet-triplet crossing in a quantum dot
• Effect of Exchange Interaction on Spin Dephasing in a Double Quantum Dot
• The Exchange Gate in Solid State Spin Quantum Computation: The Applicability of the Heisenberg Model
• Hyperfine-phonon spin relaxation in a single-electron GaAs quantum dot
• Resonant tunnelling features in the transport spectroscopy of quantum dots
• Zero-bias anomaly in cotunneling transport through quantum-dot spin valves
• Quantum gates between capacitively coupled double quantum dot two-spin qubits
• Coherent probing of excited quantum dot states in an interferometer
• Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach
• Silicon quantum dot devices with a self-aligned second gate layer
• Evidence of correlation in spin excitations of few-electron quantum dots
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors
• Background charges and quantum effects in quantum dots transport spectroscopy
• Piezomagnetic Quantum Dots
• Correlated electrons in optically-tunable quantum dots: Building an electron dimer molecule
• Two-stage Kondo effect in a four-electron artificial atom
• Kondo-temperature dependence of the Kondo splitting in a single-electron transistor
• Atom-Pair Tunneling and Quantum Phase Transition in Strong Interaction Regime
• Tunable Kondo physics in a carbon nanotube double quantum dot
• Three-electron anisotropic quantum dots in variable magnetic fields: exact results for excitation spectra, spin structures, and entanglement
• Measurement, control, and decay of quantum-dot spins
• Multi-qubit compensation sequences
• Spin of a multielectron quantum dot and its interaction with a neighboring electron
• Transport mirages in single-molecule devices
• Counting statistics of cotunneling electrons
• Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes
• Electron spin relaxation of single phosphorus donors in metal-oxide-semiconductor nanoscale devices
• Formation of Long Single Quantum Dots in High Quality InSb Nanowires Grown by Molecular Beam Epitaxy
• Effect of intrinsic spin relaxation on the spin-dependent cotunneling transport through quantum dots
• Spin filling of a quantum dot derived from excited-state spectroscopy
• A spin pump turnstile: parametric pumping of a spin-polarized current through a nearly-closed quantum dot
• Spin-Blockade Spectroscopy of Si/SiGe Quantum Dots
• Thermoelectric response of a correlated impurity in the nonequilibrium Kondo regime
• Long-range entanglement for spin qubits via quantum Hall edge modes
• Photonic quantum transport in a nonlinear optical fiber
• From a few to many electrons in quantum dots under strong magnetic fields: Properties of rotating electron molecules with multiple rings
• Cotunneling current through quantum dots with phonon-assisted spin-flip processes
• Two-Stage Kondo Effect and Kondo Box Level Spectroscopy in a Carbon Nanotube
• Spin resonance without spin splitting
• Detecting single-electron tunneling involving virtual processes in real time
• Artificial quantum-dot Helium molecules: Electronic spectra, spin structures, and Heisenberg clusters
• Electron and boson clusters in confined geometries: symmetry breaking in quantum dots and harmonic traps
• Nonuniversal transmission phase lapses through a quantum dot: An exact-diagonalization of the many-body transport problem
• Charge fluctuations in nonlinear heat transport
• Dynamical screening of the Coulomb interaction for two confined electrons in a magnetic field
• Negative exchange interactions in coupled few-electron quantum dots
• Tuning the electrically evaluated electron Lande g factor in GaAs quantum dots and quantum wells of different well widths
• Spin configurations in circular and rectangular vertical quantum dots in a magnetic field: Three-dimensional self-consistent simulation
• G-factor of electrons in gate-defined quantum dots in a strong in-plane magnetic field
• Long-range spin-coherence in a strongly-coupled all electronic dot-cavity system
• Phase transition, spin-charge separation, and spin filtering in a quantum dot
• Reduced density matrix approach to ultracold few-fermion systems in one dimension
• Interplay of exchange and superexchange in triple quantum dots
• Inverted Singlet-Triplet Qubit Coded on a Two-Electron Double Quantum Dot
• Nonequilibrium Cotunneling through a Three-Level Quantum Dot
• Symmetry breaking and Wigner molecules in few-electron quantum dots
• Theory of solid state quantum information processing
• Scaling of conductance through quantum dots with magnetic field
• Ground State and Excitations of Quantum Dots with "Magnetic Impurities"
• Coherent adiabatic theory of two-electron quantum dot molecules in external spin baths
• Out-of-equilibrium singlet-triplet Kondo effect in a single C_60 quantum dot
• Kondo effect in nanostructures
• Quantum control theory for coupled 2-electron dynamics in quantum dots
• Statistical correlations of currents flowing via proximized quantum dot
• Isotropic and Anisotropic g-factor Corrections in GaAs Quantum Dots
• Quantum computing with spins in solids
• Direct Entropy Measurement in a Mesoscopic Quantum System
• Cotunneling renormalization in carbon nanotube quantum dots
• Quantum dot occupation and electron dwell time in the cotunneling regime
• Many-body excitations in tunneling current spectra of a few-electron quantum dot
• Suppression of Kondo-assisted co-tunneling in a spin-1 quantum dot with Spin-Orbit interaction
• Magnetic field induced two-channel Kondo effect in multiple quantum dots
• Pseudospin and Quantum Computation in Semiconductor Nanostructures
• A quantitative study of spin-flip co-tunneling transport in a quantum dot
• Magnetic Splitting of the Zero Bias Peak in a Quantum Point Contact with a Variable Aspect Ratio
• Ac-cotunneling through an interacting quantum dot under a magnetic field
• Transport spectroscopy of singlet-triplet quantum dot states coupled to electronic cavities
• Supplementary Information: Quantum phase transition in a single-molecule quantum dot
• Changes of Kondo effect in the junction with DIII-class topological and $s$-wave superconductors
• Controlling inelastic cotunneling through an interacting quantum dot by a circularly-polarized field
• Negative exchange interaction in Si quantum dot arrays via valley-phase induced ${\mathbb{Z}}_2$ gauge field