Experimental evidence and consequences of rare events in quantum tunneling

被引：34

作者：

Da Costa V. ^{[1
]}

Henry Y. ^{[1
]}

Bardou F. ^{[1
]}

Romeo M. ^{[1
]}

Ounadjela K. ^{[1
]}

机构：

[1] Inst. Phys. Chim. Mat. Strasbourg, 67037 Strasbourg Cedex

来源：

The European Physical Journal B - Condensed Matter and Complex Systems | 2000年 / Springer-Verlag New York Inc.卷 / 13期

关键词：

05.40.-a Fluctuation phenomena; random processes; noise; and Brownian motion; 73.40.Gk Tunneling; 73.40.Rw Metal-insulator-metal structures;

D O I：

10.1007/s100510050035

中图分类号：

学科分类号：

摘要：

Tiny spatial fluctuations of tunnel barrier parameters are shown to have dramatic consequences on the statistical properties of quantum tunneling. A direct experimental evidence is provided that the tunnel current through metal-oxide junctions, imaged at a nanometric scale, exhibits broad statistical distributions extending over more than 4 orders of magnitude. Striking effects of broad current distributions are shown: the total tunnel transmission is dominated by few highly transmitting sites and the typical current density varies strongly with the size of the junction. Moreover, self-averaging of the tunnel current fluctuations occurs only for unexpectedly large junction areas.

引用

页码：297 / 303

页数：6

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