Nonadiabatic two-parameter charge and spin pumping in a quantum dot

被引：30

作者：

Braun, Matthias ^{[1
]}

Burkard, Guido ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Phys C, D-52056 Aachen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.101.036802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study dc charge and spin transport through a weakly coupled quantum dot, driven by a nonadiabatic periodic change of system parameters. We generalize the model of Tien and Gordon to simultaneously oscillating voltages and tunnel couplings. When applying our general result to the two-parameter charge pumping in quantum dots, we find interference effects between the oscillations of the voltage and tunnel couplings. We show that these interference effects may explain recent measurements in metallic islands. Furthermore, we discuss the possibility to electrically pump a spin current in presence of a static magnetic field.

引用

页数：4

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