Kondo effect with non collinear polarized leads: a numerical renormalization group analysis

Abstract

The Kondo effect in quantum dots attached to ferromagnetic leads with general polarization directions is studied combining poor man scaling and Wilson's numerical renormalization group methods. We show that polarized electrodes will lead in general to a splitting of the Kondo resonance in the quantum dot density of states except for a small range of angles close to the antiparallel case. We also show that an external magnetic field is able to compensate this splitting and restore the unitary limit. Finally, we study the electronic transport through the device in various limiting cases.

6 pages, 4 figures, final version

References in corpus (24)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• The Kondo Effect in the Unitary Limit
• Kondo physics in carbon nanotubes
• Quantum supercurrent transistors in carbon nanotubes
• Orbital Kondo effect in carbon nanotubes
• Kondo effect in quantum dots coupled to ferromagnetic leads
• Kondo effect in a magnetic field and the magnetoresistivity of Kondo alloys
• A Quantum Dot in the Kondo Regime Coupled to Superconductors
• Numerical Renormalization Group Calculations for the Self-energy of the impurity Anderson model
• Anomalous Kondo-effect in Quantum Dot at non-zero bias
• Generalized Numerical Renormalization Group for Dynamical Quantities
• Renormalization-group study of Anderson and Kondo impurities in gapless Fermi systems
• NRG study of the Kondo effect in the presence of itinerant-electron ferromagnetism
• Multiple Andreev Reflections in a Carbon Nanotube Quantum Dot
• Multi-wall carbon nanotubes as quantum dots
• Kondo effect in a quantum dot coupled to ferromagnetic leads: A numerical renormalization group analysis
• Nonequilibrium spintronic transport through an artificial Kondo impurity: Conductance, magnetoresistance and shot noise
• Spin-Dependent Transport Through An Interacting Quantum Dot
• Magnetotransport through a strongly interacting quantum dot
• Nonequilibrium Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads
• Kondo effect in quantum dots coupled to ferromagnetic leads with noncollinear magnetizations
• Magnetoconductance through a vibrating molecule in the Kondo regime
• Quantum dot with ferromagnetic leads: a density-matrix renormalization group study

Cited by in corpus (23)

• The numerical renormalization group method for quantum impurity systems
• Spin effects in single electron tunneling
• Kondo quantum dot coupled to ferromagnetic leads: Numerical renormalization group study
• Transport through quantum-dot spin valves containing magnetic impurities
• Tunable Kondo effect in double quantum dots coupled to ferromagnetic contacts
• Cotunneling through quantum dots coupled to magnetic leads: zero-bias anomaly for non-collinear magnetic configurations
• Kondo Resonance in the Presence of Spin-Polarized Currents
• Kondo effect in quantum dots coupled to ferromagnetic leads with noncollinear magnetizations: effects due to electron-phonon coupling
• Resonant magneto-tunneling between normal and ferromagnetic electrodes in relation to the three-terminal spin transport
• Spin-polarized tunneling microscopy and the Kondo effect
• Non-equilibrium spin-current detection with a single Kondo impurity
• Underscreened Kondo effect in quantum dots coupled to ferromagnetic leads
• Theory of spin pumping through an interacting quantum dot tunnel coupled to a ferromagnet with time-dependent magnetization
• Ferromagnetic induced Kondo effect in graphene with a magnetic impurity
• Kondo effect in a quantum dot coupled to ferromagnetic leads and side-coupled to a nonmagnetic reservoir
• Iterative path-integral summations for the tunneling magnetoresistance in interacting quantum-dot spin valves
• Theory of transport through noncollinear single-electron spin-valve transistors
• Spin transport properties of a quantum dot coupled to ferromagnetic leads with noncollinear magnetizations
• Interaction-induced current asymmetries in resonant transport through interacting quantum-dot spin valves revealed by iterative summation of path integrals
• Spatial spin-spin correlations of the single-impurity Anderson model with a ferromagnetic bath
• Spin-orbital Kondo decoherence by environmental effects in capacitively coupled quantum dot devices
• Two-orbital Kondo effect in quantum dot coupled to ferromagnetic leads
• Current fluctuations of noncollinear single-electron spin-valve transistors