Quantized conductance in Au-Pd and Au-Ag alloy nanocontacts

被引：66

作者：

Enomoto, A ^{[1
]}

Kurokawa, S ^{[1
]}

Sakai, A ^{[1
]}

机构：

[1] Kyoto Univ, Mesoscop Mat Res Ctr, Sakyo Ku, Kyoto 6068501, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.65.125410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We measure the quantized conductance in Au-Pd and Au-Ag alloy nanocontacts for a wide range of Pd and Ag concentrations, and study how the 1G(0) conductance of Au changes with alloying. In Au-Pd, the 1G(0) peak in a conductance histogram decreases in height with increasing Pd concentration, and disappears at around 80-at.% Pd. The 1G(0) peak shows no peak shift and forms no subpeaks upon Pd alloying. This result indicates that the 1G(0) conductance in Au-Pd nanocontacts is due to an all-Au atomic link connecting electrodes. Assuming a simple contact geometry, we calculate the formation probability of a Au link as a function of the Pd concentration, and find good agreement with the concentration dependence of the 1G(0) peak height. On the other hand, in Au-Ag, the 1G(0) peak can be observed for an entire range of Ag concentration, and its peak height changes as a linear compositional average of those of pure Au and Ag.

引用

页码：1 / 6

页数：6

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