Kondo box: A magnetic impurity in an ultrasmall metallic grain

被引：151

作者：

Thimm, WB

Kroha, J

von Delft, J

机构：

[1] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

[2] Univ Karlsruhe, Inst theorie Kondensierten Mat, D-76128 Karlsruhe, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.82.2143

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the Kondo effect generated by a single magnetic impurity embedded in an ultrasmall metallic grain, to be called a "Kondo box." We find that the Kondo resonance is strongly affected when the mean level spacing in the grain becomes larger than the Kondo temperature, in a way that depends on the parity of the number of electrons on the grain. We show that the single-electron tunneling conductance through such a grain features Kondo-induced Fano-type resonances of measurable size, with an anomalous dependence on temperature and level spacing.

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页码：2143 / 2146

页数：4

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