Theory of transport through quantum-dot spin valves in the weak-coupling regime

2004/04/30 by Matthias Braun, Jürgen König, J. Martinek +1 · 22 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.70.195345

published as Phys. Rev. B 70, 195345 (2004) · 14 pages, 13 figures, updated version as published, Journal reference

openalex publication_date 2004/11/29 · arxiv created 2004/12/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We develop a theory of electron transport through quantum dots that are weakly coupled to ferromagnetic leads. The theory covers both the linear and nonlinear transport regimes, takes noncollinear magnetization of the leads into account, and allows for an externally applied magnetic field. We derive generalized rate equations for the dot's occupation and accumulated spin and discuss the influence of the dot's spin on the transmission. A negative differential conductance and a nontrivial dependence of the conductance on the angle between the lead magnetizations are predicted.

Citations

• Kondo Effect in the Presence of Itinerant-Electron Ferromagnetism Studied with the Numerical Renormalization Group Method
• Positive cross-correlations due to dynamical channel blockade in a three-terminal quantum dot
• Interference effects in resonant magnetotransport
• Landauer formula for the current through an interacting electron region
• Nonequilibrium Transport through a Vertical Quantum Dot in the Absence of Spin-Flip Energy Relaxation

Cited by

• The tunnel magnetoresistance in chains of quantum dots weakly coupled to external leads
• Dynamical symmetry breaking in vibration-assisted transport through nanostructures
• Zero-bias anomaly in cotunneling transport through quantum-dot spin valves
• Interference effects in the Coulomb blockade regime: Current blocking and spin preparation in symmetric nanojunctions
• Adiabatic charge and spin pumping through quantum dots with ferromagnetic leads
• Magnetic Resonance Imaging of Single Organic Radicals with Sub-Molecular Resolution
• Theory of a magnetically controlled quantum-dot spin transistor
• Negative tunnel magnetoresistance and differential conductance in transport through double quantum dots
• Self-excited oscillations of charge-spin accumulation due to single-electron tunneling
• Multiscale approach to spin transport in magnetic multilayers
• Real-time renormalization group and cutoff scales in nonequilibrium applied to an arbitrary quantum dot in the Coulomb blockade regime
• Spin effects in electron tunneling through a quantum dot coupled to noncollinearly polarized ferromagnetic leads
• Second laws for an information driven current through a spin valve
• Odd-triplet superconductivity in single-level quantum dots
• Large Voltage-Tunable Spin Valve Based on a Double Quantum Dot
• Current-Induced Spin Torque in a Nanomagnet
• Magnon-driven quantum-dot heat engine
• Qubit quantum-dot sensors: Noise cancellation by coherent backaction, initial slips, and elliptical precession
• Kondo quantum dot coupled to ferromagnetic leads: Numerical renormalization group study
• Autonomous quantum Maxwell's demon based on two exchange-coupled quantum dots
• Transport statistics of interacting double dot systems: Coherent and non-Markovian effects
• Generation of pure spin currents by superconducting proximity effect in quantum dots