Tunnel magnetoresistance of quantum dots coupled to ferromagnetic leads in the sequential and cotunneling regimes

Abstract

We study electronic transport through quantum dots weakly coupled to ferromagnetic leads with collinear magnetization directions. Tunneling contributions of first and second order in the tunnel-coupling strength are taken into account. We analyze the tunnel magnetoresistance (TMR) for all combinations of linear and nonlinear response, at or off resonance, with an even or odd dot-electron number. Different mechanisms for transport and spin accumulation the various regimes give rise to different TMR behavior.

submitted to Phys. Rev. B

References in corpus (5)

• Kondo effect in quantum dots coupled to ferromagnetic leads
• NRG study of the Kondo effect in the presence of itinerant-electron ferromagnetism
• Persistent current in ballistic mesoscopic rings with Rashba spin-orbit coupling
• Zero-bias anomaly in cotunneling transport through quantum-dot spin valves
• Spin Dependent Transport in Magnetic Nanostructures

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