Smearing of the Coulomb blockade by resonant tunneling

被引：15

作者：

Gramespacher, T ^{[1
]}

Matveev, KA ^{[1
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 21期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.85.4582

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the Coulomb blockade in a grain coupled to a lead via a resonant impurity level. We show that the strong energy dependence of the transmission coefficient through the impurity level can have a dramatic effect on the quantization of the grain charge. In particular, if the resonance is sufficiently narrow, the Coulomb staircase shows very sharp steps even if the transmission through the impurity at the Fermi energy is perfect. This is in contrast to the naive expectation that perfect transmission should completely smear charging effects.

引用

页码：4582 / 4585

页数：4

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