Kondo effect in normal-superconductor quantum dots -: art. no. 094515

被引：109

作者：

Cuevas, JC ^{[1
]}

Yeyati, AL

Martín-Rodero, A

机构：

[1] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada CV, E-28049 Madrid, Spain

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

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.63.094515

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the transport properties of a quantum dot coupled to a normal and a superconducting lead. The dot is represented by a generalized Anderson model. Correlation effects are taken into account by an appropriate self-energy that interpolates between the limits of weak and strong coupling to the leads. The transport properties of the system are controlled by the interplay between the Kondo effect and Andreev reflection processes. We show that, depending on the parameters' range, the conductance can either be enhanced or suppressed as compared to the normal case. In particular, by adequately tuning the coupling to the leads one can reach the maximum value 4e(2)/h for the conductance.

引用

页数：5

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