Mesoscopic Kondo effect in an Aharonov-Bohm ring

被引：74

作者：

Kang, K ^{[1
]}

Shin, SC

机构：

[1] Chonbuk Natl Univ, Dept Phys, Chonju 561756, Chonbuk, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

[3] Korea Adv Inst Sci & Technol, Ctr Nanospin Spintron Mat, Taejon 305701, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.85.5619

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An interacting quantum dot inserted in a mesoscopic ring is investigated. A variational ansatz is employed to describe the ground state of the system in the presence of the Aharonov-Bohm flux. It is shown that, for an even number of electrons with the energy level spacing smaller than the Kondo temperature. the persistent current has a value similar to that of a perfect ring with the same radius. On the Ether hand, for a ring with an odd number of electrons, the persistent current is found to be strongly suppressed compared to that of an ideal ring, which implies the suppression of the Kondo-resonant transmission. Various aspects of the Kondo-assisted persistent current are discussed.

引用

页码：5619 / 5622

页数：4

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