Spin current generation and detection by a double quantum dot structure

Abstract

We propose a device acting as a spin valve which is based on a double quantum dot structure with parallel topology. Using the exact analytical solution for the noninteracting case we argue that, at a certain constellation of system parameters and externally applied fields, the electric current through the constriction can become almost fully spin-polarized. We discuss the influence of the coupling asymmetry, finite temperatures and interactions on the efficiency of the device and make predictions for the experimental realization of the effect.

5 pages, 5 figures (eps)

References in corpus (2)

• Correlated electron tunneling through two separate quantum dot systems with strong capacitive interdot coupling
• Spin-polarized currents through interacting quantum wires with nonmagnetic leads

Cited by in corpus (11)

• Charge transfer statistics of a molecular quantum dot with strong electron-phonon interaction
• Full electrostatic control over polarized currents through spin-orbital Kondo effect
• Charge transfer statistics and entanglement in normal-quantum dot-superconductor hybrid structures
• Wiedemann-Franz law in scattering theory revisited
• The $SU(4)-SU(2)$ crossover and spin filter properties of a double quantum dot nanosystem
• Kondo effect and spin-active scattering in ferromagnet-superconductor junctions
• Transport properties of a molecular quantum dot coupled to one-dimensional correlated electrons
• Nonequilibrium transport properties of a double quantum dot in the Kondo regime
• Ab initio materials physics and microscopic electrodynamics of media
• The RKKY Interaction and the Nature of the Ground State of Double Dots in Parallel
• Full counting statistics of persistent current