QUANTUM LIMITATION ON COULOMB BLOCKADE OBSERVED IN A 2D ELECTRON-SYSTEM

被引：77

作者：

PASQUIER, C ^{[1
]}

MEIRAV, U ^{[1
]}

WILLIAMS, FIB ^{[1
]}

GLATTLI, DC ^{[1
]}

JIN, Y ^{[1
]}

ETIENNE, B ^{[1
]}

机构：

[1] CNRS,MICROSTRUCT & MICROELECTR LAB,F-94220 BAGNEUX,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.70.69

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The evolution of the Coulomb blockade of conduction through a small 2D electron island of large density of states, realized in a GaAs/Ga(Al)As heterojunction, is studied from the weak tunnel coupling to the Ohmic regime. Cotunneling arising from quantum charge fluctuations is identified, at low voltage, by its dependence on the product of junction conductances, and the current at threshold voltage is well described by a nonperturbative model. Small Coulomb conductance oscillations are found to persist even when both junctions exceed the conductance quantum.

引用

页码：69 / 72

页数：4

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