Zero-bias anomaly in cotunneling transport through quantum-dot spin valves -: art. no. 113301

被引：61

作者：

Weymann, I ^{[1
]}

Barnas, J

König, J

Martinek, J

Schön, G

机构：

[1] Adam Mickiewicz Univ, Dept Phys, PL-61614 Poznan, Poland

[2] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

[3] Ruhr Univ Bochum, Inst Theoret Phys 3, D-44780 Bochum, Germany

[4] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

[5] Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.72.113301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We predict a zero-bias anomaly in the differential conductance through a quantum dot coupled to two ferromagnetic leads with antiparallel magnetization. The anomaly differs in origin and properties from other anomalies in transport through quantum dots, such as the Kondo effect. It occurs in Coulomb-blockade valleys with an unpaired dot electron. It is a consequence of the interplay of single- and double-barrier cotunneling processes and their effect on the spin accumulation in the dot. The anomaly becomes significantly modified when a magnetic field is applied.

引用

页数：4

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