Quantized conductivity in STM drawn 100 angstrom nanowires of Au and Ni

被引:3
作者
Rodell, B
Korenivski, V
Costa, J
Rao, KV
机构
[1] Dept. of Condensed Matter Physics, Royal Institute of Technology
来源
NANOSTRUCTURED MATERIALS | 1996年 / 7卷 / 1-2期
关键词
D O I
10.1016/0965-9773(95)00300-2
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have drawn, using a scanning tunneling microscope, nanosize wires of gold and nickel ranging from 1 to 15 nm in length. On thinning the nanowires to a few atomic chains we observe characteristic quantized steps in the conductance, the height of which correlates with the quantum of conductance 2e(2)/h. However, the resistance of the long (similar to 10 nm) wire is much larger than 12.9 k Omega, the value expected for a single quantum conductance channel, which suggests possible localization effects. Furthermore, the current-voltage characteristics of such long wires is no longer metallic, and exhibits a voltage dependent resistance. These results are qualitatively similar for Au and Ni, demonstrating that resistance values of the order of 100 k Omega and the non-metallic I-V characteristics are inherent to long narrow metallic junctions and are not limited to gold wires alone. However, we find that in the case of Ni, the I vs V non-linearities are less pronounced for the same length of the wire.
引用
收藏
页码:229 / 235
页数:7
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