Spin-orbital and spin Kondo effects in parallel coupled quantum dots

Abstract

Strong electron correlations and interference effects are discussed in parallel-coupled single-level and orbitally doubly degenerate quantum dots. The finite-U mean-field slave boson approach is used to study many-body effects. The analysis is carried out in a wide range of parameter space including both atomic-like and molecular-like Kondo regimes and taking into account various perturbations, like interdot tunneling, interdot interaction, mixing of the electrode channels and exchange interaction. We also discuss the influence of singularities of electronic structure and the impact of polarization of electrodes. Special attention is paid to potential spintronic applications of these systems showing how current polarization can be controlled by adjusting interference conditions and correlations by gate voltage. Simple proposals of double dot spin valve and bipolar electrically tunable spin filter are presented.

14 pages, 16 figures

References in corpus (26)

• Orbital Kondo effect in carbon nanotubes
• Direct Measurement of the Spin-Orbit Interaction in a Two-Electron InAs Nanowire Quantum Dot
• NRG study of the Kondo effect in the presence of itinerant-electron ferromagnetism
• Multi-impurity Anderson model for quantum dots coupled in parallel
• Interference Effects on Kondo-Assisted Transport through Double Quantum Dots
• SU(4) and SU(2) Kondo Effects in Carbon Nanotube Quantum Dots
• Quantum criticality in a double quantum-dot system
• Dark states in the magnetotransport through triple quantum dots
• Quantum phase transition in capacitively coupled double quantum dots
• Evolution of SU(4) Transport Regimes in Carbon Nanotube Quantum Dots
• Kondo Effects in Carbon Nanotubes: From SU(4) to SU(2) symmetry
• Molecular states in carbon nanotube double quantum dots
• Zero-bias conductance in carbon nanotube quantum dots
• Correlated electron tunneling through two separate quantum dot systems with strong capacitive interdot coupling
• Kondo-Dicke resonances in electronic transport through triple quantum dots
• Transport through a quantum dot with SU(4) Kondo entanglement
• Kondo effect in coupled quantum dots with RKKY interaction: Finite temperature and magnetic field effects
• Renormalization group study of capacitively coupled double quantum dots
• Spin polarized current and shot noise in carbon nanotube quantum dot in the Kondo regime
• Kondo and Dicke effect in quantum-dots side coupled to a quantum wire
• Fabry-Perot interference, Kondo effect and Coulomb blockade in carbon nanotubes
• Dicke-like effect in spin-polarized transport through coupled quantum dots
• The Kondo Temperature of SU(4) Symmetric Quantum Dots
• Gate voltage effects in capacitively coupled quantum dots
• Kondo temperature and screening extension in a double dot system
• Quantum Dot Spin Filter in Resonant Tunneling and Kondo Regimes

Cited by in corpus (10)

• Interactions and thermoelectric effects in a parallel-coupled double quantum dot
• Spin-dependent thermoelectric effects in a strongly correlated double quantum dot
• Waiting time distribution revealing the internal spin dynamics in a double quantum dot
• Tuning the two-electron hybridization and spin states in parallel-coupled InAs quantum dots
• Intra- and inter-shell Kondo effects in carbon nanotube quantum dots
• Suppressed Josephson phase transition in one parallel double-quantum-dot junction
• Selective tuning of spin-orbital Kondo contributions in parallel-coupled quantum dots
• Electron-phonon interaction and electronic correlations in transport through electrostatically and tunnel coupled quantum dots
• Fractional shot noise of an SU(N) Kondo system
• Phonon-assisted transport through double-dot Aharonov-Bohm interferometer in the Kondo regime