Charge pumping in mesoscopic systems coupled to a superconducting lead

被引：59
|
作者：
Blaauboer, M [1 ]
机构：
[1] Delft Univ Technol, Dept Appl Phys, NL-2628 CJ Delft, Netherlands
来源：
PHYSICAL REVIEW B | 2002年 / 65卷 / 23期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.65.235318
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We derive a general scattering-matrix formula for the pumped current through a mesoscopic region attached to a normal and a superconducting lead. As applications of this result we calculate the current pumped through (i) a pump in a wire, (ii) a quantum dot in the Coulomb blockade regime, and (iii) a ballistic double-barrier junction, all coupled to a superconducting lead. Andreev reflection is shown to enhance the pumped current by up to a factor of 4 in the case of equal coupling to the leads. We find that this enhancement can still be further increased for slightly asymmetric coupling.
引用
收藏
页码：1 / 5
页数：5
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