Observation of the fano-kondo antiresonance in a quantum wire with a side-coupled quantum dot

被引：151

作者：

Sato, M ^{[1
]}

Aikawa, H ^{[1
]}

Kobayashi, K ^{[1
]}

Katsumoto, S ^{[1
]}

Iye, Y ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.95.066801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed the Fano-Kondo antiresonance in a quantum wire with a side-coupled quantum dot. In a weak coupling regime, dips due to the Fano effect appeared. As the coupling strength increased, conductance in the regions between the dips decreased alternately. From the temperature dependence and the response to the magnetic field, we conclude that the conductance reduction is due to the Fano-Kondo antiresonance. At a Kondo valley with the Fano parameter q approximate to 0, the phase shift is locked to pi/2 against the gate voltage when the system is close to the unitary limit in agreement with theoretical predictions by Gerland et al. [Phys. Rev. Lett. 84, 3710 (2000)].

引用

页数：4

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