Direct observation of single-electron decay from an artificial nucleus

被引：26

作者：

Cooper, J

Smith, CG

Ritchie, DA

Linfield, EH

Jin, Y

Launois, H

机构：

[1] Semicond Phys Grp, Cavendish Lab, Cambridge CB3 OHE, England

[2] CNRS, L2M 196, F-92220 Bagneux, France

来源：

PHYSICA E | 2000年 / 6卷 / 1-4期

基金：

英国工程与自然科学研究理事会;

关键词：

quantum dots; electrometer; charge detector; electron decay;

D O I：

10.1016/S1386-9477(99)00208-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We describe the behaviour of an isolated quantum dot charged up with an excess of 30 electrons over its equilibrium value. A non-invasive voltage probe with a charge resolution of e/10 is fabricated next to the dot and used to measure the electron decay rate. The system behaves like an artificial nucleus with the electron escape rate following a Poisson distribution. We observe times for tunnelling of electrons out of the dot in excess of 1000 s. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

引用

页码：457 / 460

页数：4

共 13 条

[1] Electrons in artificial atoms [J].