Current fluctuations of noncollinear single-electron spin-valve transistors

Abstract

We theoretically investigate the finite-frequency as well as the zero-frequency charge-current fluctuations through a noncollinear single-electron spin-valve transistor in the limit of sequential tunneling. The system under consideration consists of two tunnel junctions that connect a small central metallic island to two ferromagnetic leads with noncollinear magnetization. Due to the spin-dependent tunnel coupling and the electron-electron interaction on the central electrode an exchange field that acts on the accumulated island spin is present. We analyze how this many-particle interaction effect influences the current noise. In detail, we present that the field leads to a reduction of the sub-Poissonian Fano factor.

12 pages and 7 figures

References in corpus (22)

• Kondo effect in quantum dots coupled to ferromagnetic leads
• 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
• Full counting statistics of super-Poissonian shot noise in multi-level quantum dots
• Full Counting Statistics in Strongly Interacting Systems: Non-Markovian Effects
• Spin effects in single electron tunneling
• Rate equations for Coulomb blockade with ferromagnetic leads
• Spin injection in a single metallic nanoparticle: a step towards nanospintronics
• Super-poissonian noise, negative differential conductance, and relaxation effects in transport through molecules, quantum dots and nanotubes
• A benzene interference single-electron transistor
• 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
• Transport through quantum-dot spin valves containing magnetic impurities
• Shot noise in a diffusive F-N-F spin valve
• 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
• Transport through single-wall metallic carbon nanotubes in the cotunneling regime
• Current and Shot Noise Measurements in a Carbon Nanotube-Based Spin Diode
• Exchange effects on electron transport through single-electron spin-valve transistors
• Transport through two-level quantum dots weakly coupled to ferromagnetic leads
• Charge fluctuations and feedback effect in shot noise in a Y-terminal system