Kondo correlation and spin-flip scattering in spin-dependent transport through a quantum dot coupled to ferromagnetic leads

Abstract

We investigate the linear and nonlinear dc transport through an interacting quantum dot connected to two ferromagnetic electrodes around Kondo regime with spin-flip scattering in the dot. Using a slave-boson mean field approach for the Anderson Hamiltonian having finite on-site Coulomb repulsion, we find that a spin-flip scattering always depresses the Kondo correlation at arbitrary polarization strength in both parallel and antiparallel alignment of the lead magnetization and that it effectively reinforces the tunneling related conductance in the antiparallel configuration. For systems deep in the Kondo regime, the zero-bias single Kondo peak in the differential conductance is split into two peaks by the intradot spin-flip scattering; while for systems somewhat further from the Kondo center, the spin-flip process in the dot may turn the zero-bias anomaly into a three-peak structure.

arXiv comment4 pages, 2 figures

References in corpus (10)

• Time-dependent transport in interacting and non-interacting mesoscopic systems
• Kondo effect in quantum dots coupled to ferromagnetic leads
• NRG study of the Kondo effect in the presence of itinerant-electron ferromagnetism
• Out-of-equilibrium Kondo effect in Double Quantum Dots
• Interaction-driven spin precession in quantum-dot spin valves
• 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
• Using single quantum states as spin filters to study spin polarization in ferromagnets
• Kondo-type transport through an interacting quantum dot coupled to ferromagnetic leads

Cited by in corpus (7)

• Thermoelectric effects in strongly interacting quantum dot coupled to ferromagnetic leads
• Rate equations for Coulomb blockade with ferromagnetic leads
• Entanglement spectrum and number fluctuations in the spin-partitioned BCS ground state
• Thermoelectric effects in a strongly interacting quantum dot coupled to ferromagnetic leads
• Compensation of the Kondo effect in quantum dots coupled to ferromagnetic leads within equation of motion approach
• Nonequilibrium Steady States and Fano-Kondo Resonances in an AB Ring with a Quantum Dot
• Residual Kondo effect in quantum dot coupled to half-metallic ferromagnets