The Two-impurity Anderson Model Revisited: Competition between Kondo Effect and Reservoir-mediated Superexchange in Double Quantum Dots
arXiv:0911.0959 · doi:10.1103/PhysRevB.81.121311
Abstract
We study a series-coupled double quantum dot in the Kondo regime modeled by the two-impurity Anderson model and find a new conduction-band mediated superexchange interaction that competes with Kondo physics in the strong Coulomb interaction limit. Our numerical renormalization group results, complemented with the higher-order Rayleigh-Schrödinger perturbation theory, show that the novel exchange mechanism leads to clear experimental consequences that can be checked in transport measurements through double quantum dots.
References in corpus (9)
- Tunable Non-local Spin Control in a Coupled Quantum Dot System
- Transition between Quantum States in a Parallel-Coupled Double-Quantum-Dot
- RKKY and magnetic field interactions in coupled Kondo quantum dots
- Quantum criticality in a double quantum-dot system
- Renormalized Parameters for Impurity Models
- Magnetic Field Effects on Quasiparticles in Strongly Correlated Local Systems
- Determination of the phase shifts for interacting electrons connected to reservoirs
- NRG approach to the transport through a finite Hubbard chain connected to reservoirs
- Kondo Physics and Exact Solvability of Double Dots Systems
Cited by in corpus (12)
- Advances and challenges in single-molecule electron transport
- Josephson current in strongly correlated double quantum dots
- Numerical sub-gap spectroscopy of double quantum dots coupled to superconductors
- Dynamical mean-field theory of indirect magnetic exchange
- Spectral properties of the two-impurity Anderson model with varying distance and various interactions
- Spin-orbital and spin Kondo effects in parallel coupled quantum dots
- Nonlocal Andreev Reflections as a Source of Spin Exchange and Kondo Screening
- Manipulability of the Kondo effect in a T-shaped triple-quantum-dot structure
- The RKKY Interaction and the Nature of the Ground State of Double Dots in Parallel
- Gutzwiller variational approach to the two-impurity Anderson model at particle-hole symmetry
- Exact diagonalization study of double quantum dots in parallel geometry in zero-bandwidth limit
- Tunneling in multi-site mesoscopic quantum Hall circuits