Current fluctuations in noncollinear single-electron spin-valve transistors

被引：1
作者：
Lindebaum, Stephan [1 ]
Koenig, Juergen
机构：
[1] Univ Duisburg Essen, D-47048 Duisburg, Germany
来源：
PHYSICAL REVIEW B | 2012年 / 86卷 / 12期
关键词：
FERROMAGNETIC TUNNEL-JUNCTIONS; MAGNETO-COULOMB OSCILLATIONS; FREQUENCY SHOT-NOISE; NORMAL-METAL SYSTEMS; ZERO-BIAS ANOMALIES; QUANTUM DOTS; MAGNETORESISTANCE; ACCUMULATION; TRANSPORT; BLOCKADE;
D O I：
10.1103/PhysRevB.86.125306
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
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页数：11
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