Evidence for saturation of channel transmission from conductance fluctuations in atomic-size point contacts

被引：116
作者：
Ludoph, B
Devoret, MH
Esteve, D
Urbina, C
van Ruitenbeek, JM
机构：
[1] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands
[2] CEA Saclay, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.82.1530
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The conductance of atomic-size contacts has a small, random, voltage dependent component analogous to conductance fluctuations observed in diffusive wires. A new effect is observed in gold contacts, consisting of a marked suppression of these fluctuations when the conductance of the contact is close to integer multiples of the conductance quantum. Using a model based on the Landauer-Buttiker formalism, we interpret this effect as:evidence that the conductance tends to be built up from fully transmitted (i.e., saturated) channels plus a single, which is partially transmitted. [S0031-9007(99)08417-3].
引用
收藏
页码：1530 / 1533
页数：4
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