Aharonov-Bohm oscillations in coupled quantum dots: Effect of electron-electron interactions

被引：3

作者：

Semenov, Andrew G. ^{[1
]}

Golubev, Dmitri S. ^{[2
]}

Zaikin, Andrei D. ^{[1
,2
]}

机构：

[1] PN Lebedev Phys Inst, IE Tamm Dept Theoret Phys, Moscow 119991, Russia

[2] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 11期

关键词：

Aharonov-Bohm effect; Coulomb blockade; exchange interactions (electron); quantum dots; TUNNEL-JUNCTIONS; WEAK-LOCALIZATION; COULOMB-BLOCKADE; DECOHERENCE; SATURATION;

D O I：

10.1103/PhysRevB.79.115302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We theoretically analyze the effect of electron-electron interactions on Aharonov-Bohm (AB) current oscillations in ring-shaped systems with metallic quantum dots pierced by external magnetic field. We demonstrate that electron-electron interactions suppress the amplitude of AB oscillations I(AB) at all temperatures down to T=0, and we formulate quantitative predictions which can be verified in future experiments. We argue that the main physical reason for such interaction-induced suppression of I(AB) is electron dephasing, while Coulomb blockade effects remain insignificant in the case of metallic quantum dots considered here. We also emphasize a direct relation between our results and the so-called P(E) theory describing tunneling of interacting electrons.

引用

页数：10

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