Perturbative approach to the nonequilibrium Kondo effect in a quantum dot

被引：83

作者：

Fujii, T ^{[1
]}

Ueda, K

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.68.155310

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The theory of quantum transport through a dot under a finite bias voltage is developed using perturbation theory in the Keldysh formalism. It is found that the Kondo resonance splits into double peaks when the voltage exceeds the Kondo temperature, eV>k(B)T(K), which leads to the appearance of a second peak in conductance, in addition to the zero-bias peak. The possible relevance of the new peak to the 0.7 conductance anomaly observed in quantum point contact is discussed.

引用

页数：5

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