Transport through quantum-dot spin valves containing magnetic impurities

Abstract

We investigate transport through a single-level quantum dot coupled to noncollinearly magnetized ferromagnets in the presence of localized spins in either the tunnel barrier or on the quantum dot. For a spin embedded in the tunnel barrier, we find an interplay between current-induced switching of the spin, spin-dependent tunneling through the barrier and spin accumulation on the dot resulting in characteristic signals in the current. We, furthermore, find huge Fano factors due to random telegraph noise. For noncollinear geometries, an exchange field that depends on the impurity spin state leads to characteristic fingerprints in the transport properties. In the case of a spin on the quantum dot, we find that the frequency-dependent Fano factor can be used to study the nontrivial dynamics of the spins on the dot due to the interplay between exchange interaction and coupling to external and exchange magnetic fields.

25 pages, 14 figures

References in corpus (30)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
• Kondo effect in quantum dots coupled to ferromagnetic leads
• Theory of the Franck-Condon blockade regime
• NRG study of the Kondo effect in the presence of itinerant-electron ferromagnetism
• Electric-field controlled spin reversal in a quantum dot with ferromagnetic contacts
• Electric Field Controlled Magnetic Anisotropy in a Single Molecule
• Dynamic Nuclear Polarization with Single Electron Spins
• Shot noise in tunneling transport through molecules and quantum dots
• Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime
• Spin injection in a single metallic nanoparticle: a step towards nanospintronics
• Spin Inelastic Electron Tunneling Spectroscopy on Local Spin Adsorbed on Surface
• Spin transport through a single self-assembled InAs quantum dot with ferromagnetic leads
• Kondo effect in a semiconductor quantum dot coupled to ferromagnetic electrodes
• Nonequilibrium Kondo Effect in a Quantum Dot Coupled to Ferromagnetic Leads
• Single Electron Transport in electrically tunable nanomagnets
• Electric-field control of tunneling magnetoresistance effect in a Ni/InAs/Ni quantum-dot spin valve
• Adiabatic charge and spin pumping through quantum dots with ferromagnetic leads
• Electrically-Driven Reverse Overhauser Pumping of Nuclear Spins in Quantum Dots
• Magnetoresistance of a quantum dot with spin-active interfaces
• Tunable dynamical channel blockade in double-dot Aharonov-Bohm interferometers
• Spin-induced charge correlations in transport through interacting quantum dots with ferromagnetic leads
• Probing the exchange field of a quantum-dot spin valve by a superconducting lead
• Kondo effect with non collinear polarized leads: a numerical renormalization group analysis
• Exchange-controlled single-electron-spin rotations in quantum dots
• Non-equilibrium current and noise in inelastic tunneling through a magnetic atom
• Current and Shot Noise Measurements in a Carbon Nanotube-Based Spin Diode
• Influence of spin waves on transport through a quantum-dot spin valve
• Single Spin Transport Spectroscopy - Current Blockade and Spin Decay
• Transport through two-level quantum dots weakly coupled to ferromagnetic leads

Cited by in corpus (9)

• Spintronic magnetic anisotropy
• Electronic waiting-time distribution of a quantum-dot spin valve
• The formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution
• Full Counting statistics of level renormalization in electron transport through double quantum dots
• Adiabatic pumping through an interacting quantum dot with spin-orbit coupling
• Semiclassical spin-spin dynamics and feedback control in transport through a quantum dot
• Transport through single-level systems: Spin dynamics in the nonadiabatic regime
• Transport and semiclassical dynamics of coupled quantum dots interacting with a local magnetic moment
• Current fluctuations of noncollinear single-electron spin-valve transistors