COULOMB-BLOCKADE SPECTROSCOPY OF GOLD PARTICLES IMAGED WITH SCANNING-TUNNELING-MICROSCOPY

被引：40

作者：

AMMAN, M ^{[1
]}

FIELD, SB ^{[1
]}

JAKLEVIC, RC ^{[1
]}

机构：

[1] FORD MOTOR CO,SCI RES LAB,DEARBORN,MI 48121

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.48.12104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have measured Coulomb-blockade effects in a two-tunnel-junction structure formed with a scanning-tunneling-microscope (STM) tip and samples composed of gold particles deposited onto a partially oxidized aluminum-base-layer film. Clear topographic images of the particles are routinely taken with the STM and well-defined Coulomb-blockade and staircase current-voltage (I-V) characteristics of the imaged particles are obtained. The variable nature of the tip-particle junction is used to measure the changes in the I-V characteristic as the tip-particle separation is changed. Using a semiclassical theory for the Coulomb blockade in serially coupled junctions, the tip-particle and particle-base-layer junction parameters are uniquely determined. These parameters vary as expected due to the changing tip-particle separation and are consistent with the geometric information obtained in the images. In addition, when the tip-particle separation is made small, a smearing of the Coulomb staircase occurs that is not described by the semiclassical theory.

引用

页码：12104 / 12109

页数：6

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