Exchange effects on electron transport through single-electron spin-valve transistors

Abstract

We study electron transport through single-electron spin-valve transistors in the presence of non-local exchange between the ferromagnetic leads and the central normal-metal island. The Coulomb interaction is described with the orthodox model for Coulomb blockade and we allow for noncollinear lead magnetization directions. Two distinct exchange mechanisms that have been discussed in the literature are shown to be of comparable strength and are taken into account on equal footing. We present results for the linear conductance as a function of gate voltage and magnetic configuration, and discuss the response of the system to applied magnetic fields.

15 pages, 6 figures

References in corpus (5)

• Non-collinear Magnetoelectronics
• Kondo effect in quantum dots coupled to ferromagnetic leads
• Rate equations for Coulomb blockade with ferromagnetic leads
• Spin injection in a single metallic nanoparticle: a step towards nanospintronics
• Spin Current and Current-Induced Spin Transfer Torque in Ferromagnet-Quantum Dot-Ferromagnet Coupled Systems

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• Theory of a Magnetically-Controlled Quantum-Dot Spin Transistor
• Saturation of Spin-Polarized Current in Nanometer Scale Aluminum Grains
• Modelling Electron Spin Accumulation in a Metallic Nanoparticle
• Charge and spin transport in spin valves with anisotropic spin relaxation