Superconducting nonequilibrium transport through a weakly interacting quantum dot

被引：25
|
作者：
Dell'Anna, L. [1 ]
Zazunov, A. [1 ]
Egger, R. [1 ]
机构：
[1] Univ Dusseldorf, Inst Theoret Phys, D-40225 Dusseldorf, Germany
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 10期
关键词：
D O I：
10.1103/PhysRevB.77.104525
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the out-of-equilibrium current through an interacting quantum dot, which is modeled as an Anderson impurity contacted by two BCS superconductors held at fixed voltage bias. In order to account for multiple Andreev reflections, we develop a Keldysh Green's function scheme perturbative in the dot's interaction strength. We find an unexpected enhancement of the current due to repulsive interactions for small to intermediate lead-to-dot couplings.
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页数：6
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