Split Kondo resonances in quantum dots at finite magnetic fields

被引：2

作者：

Schmid, J ^{[1
]}

Weis, J ^{[1
]}

Eberl, K ^{[1
]}

von Klitzing, K ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICA E | 2001年 / 9卷 / 01期

关键词：

Kondo resonance; quantum dots; Anderson model; spin splitting;

D O I：

10.1016/S1386-9477(00)00177-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Kondo resonances have recently been observed in transport measurements through quantum dots. In certain Coulomb blockade regions a peak in the differential conductance at zero source-drain voltage develops with lowering the temperature. The Anderson impurity model, used to explain these observations, requires a degeneracy. For a slightly lifted degeneracy, the Kondo resonances are expected to split. Here we present measurements in magnetic fields showing split Kondo resonances which occur in a regular pattern as a function of gate voltage and magnetic field. This pattern is related to the electronic spectrum of the quantum dot and it is found that differences in the tunnel coupling are essential to understand these experimental results. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：54 / 59

页数：6

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