Current fluctuations in noncollinear single-electron spin-valve transistors

Article

关键词: FERROMAGNETIC TUNNEL-JUNCTIONS;    MAGNETO-COULOMB OSCILLATIONS;    FREQUENCY SHOT-NOISE;    NORMAL-METAL SYSTEMS;    ZERO-BIAS ANOMALIES;    QUANTUM DOTS;    MAGNETORESISTANCE;    ACCUMULATION;    TRANSPORT;    BLOCKADE;   

DOI  :  10.1103/PhysRevB.86.125306

来源: SCIE

【 摘 要 】

We present a theoretical framework to analyze fluctuations of electric current through a noncollinear single-electron spin-valve transistor in the limit of weak tunnel coupling. The system under consideration consists of two tunnel junctions that connect a small, nonmagnetic metallic island to two ferromagnetic leads with noncollinear magnetization. We study the current noise spectrum as a function of bias voltage, frequency, and the relative angle between the leads' magnetization directions and find that both the zero- and the finite-frequency current noise are strongly affected by charging energy and spin accumulation in the island.

【 授权许可】

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